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annotate doc/C139-Howto @ 351:353514087133

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components/config_gsm_{fl,ir}: created
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 24 Dec 2017 23:43:51 +0000
parents e2dce971aec9
children
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1 Running FreeCalypso firmware on the Motorola C139
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2 =================================================
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3
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4 Mot C139 phones are brickable - because the Calypso boot ROM is disabled by PCB
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5 wiring, the ability to reflash a phone with new firmware critically depends on
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6 there being a particular kind of boot code in flash sector 0 at all times - a
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7 particular kind of boot code that allows the boot process to be interrupted and
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8 diverted to external code loaded via the headset jack serial port.
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9
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10 The FreeCalypso project has adopted one specific version of the flash sector 0
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11 boot code (produced by applying a binary patch to one of Compal/Motorola's
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12 original versions) for use with all of our firmwares for this target. No matter
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13 which FreeCalypso firmware you are running - Citrine, Magnetite or tcs211-c139 -
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14 you flash your FC fw image at offset 0x10000 while keeping this boilerplate boot
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15 code at the beginning of the flash:
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16
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17 ftp://ftp.freecalypso.org/pub/GSM/FreeCalypso/compal-flash-boot-for-fc.bin
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18
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19 We are currently able to produce two kinds of firmware builds for the C139:
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20 pseudo-modem or UI demo. The pseudo-modem configuration is intended for those
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21 who would really like to play with AT-command-controlled modem firmware on some
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22 proper Calypso modem hardware like our desired FCDEV3B, but who are using a
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23 C139 instead out of poverty - a poor man's substitute for proper modem hardware.
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24 In this configuration the C139 phone's LCD stays dark, the buttons do nothing,
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25 but the firmware presents TI's RVTMUX interface with FreeCalypso extensions on
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26 the headset jack serial port. You connect to this serial interface with
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27 FreeCalypso host utility rvinterf, and use another FC host utility fc-shell to
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28 talk AT commands to the pseudo-modem.
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29
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30 If you flash a C139 phone with one of our pseudo-modem firmware builds, it will
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31 behave in some odd ways which you might not expect:
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32
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33 * Whenever the phone is off but the battery is inserted, even a momentary
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34 accidental press of the power button will launch a full power-on and firmware
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35 boot - without any visible indication whatsoever as the LCD stays dark!
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36
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37 * Once the firmware has booted from a press of the power button - even a
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38 momentary accidental press - there is no way to make it shut down and power
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39 off except by sending a power-off command via the headset jack serial port.
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40 So it will just keep running until the battery runs down, once again with the
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41 LCD dark and no visible indication of any kind that it's on.
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42
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43 In the UI demo configuration (see Handset-configs) the FC-reflashed C139 acts
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44 *almost* like an end user phone: it can be operated from the keypad without
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45 being connected to a PC with a serial cable, there is a very rudimentary UI
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46 presented on the LCD, the phone can be turned on and off with the power button.
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47 However, battery charging doesn't work, there is not even a working battery
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48 gauge, and the UI is full of serious bugs. Thus this fw configuration is
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49 intended as a DEMO, not something to be inflicted on an actual end user!
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50
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51 Additional considerations are:
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52
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53 * Flashing a given phone back and forth between FreeCalypso and Mot/Compal's
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54 official firmware is a royal pita, so if you are going to play with
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55 FreeCalypso on a C139, it would be the easiest to dedicate a phone
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56 specifically for FC experiments;
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57
221
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58 * We haven't got firmware-controlled battery charging working yet in any of our
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59 fw configurations, so you will need another phone running one of the official
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60 fw versions to charge batteries.
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61
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62 Converting a phone to FreeCalypso
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63 =================================
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64
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65 Start by installing FreeCalypso host tools on your PC/laptop or whatever host
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66 you will use to talk to C139 phones, if you haven't already. If you are
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67 starting with an unhacked C139 phone running one of the official firmware
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68 versions, the procedure for flashing and bringing up FreeCalypso for the first
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69 time is as follows:
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70
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71 * Note down your phone's factory IMEI. After you get FreeCalypso firmware
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72 flashed and running, you will need to set your own IMEISV, as our fw doesn't
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73 know how to grok Mot/Compal's flash data structures where they store theirs.
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74 You can set whatever IMEISV you like, but if you would like to keep the
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75 factory one, it would be the easiest to have it noted down on a piece of
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76 paper. If you have a labelmaker, you can print a sticky label with the IMEI
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77 and stick it on the side of the phone where you can easily see it later while
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78 playing with FreeCalypso.
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79
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80 * Get in with fc-loadtool, preceded with tfc139 if necessary - see FC host tools
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81 documentation.
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82
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83 * Once you are in with fc-loadtool, i.e., at the loadtool> prompt, reflash the
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84 boot sector with the FreeCalypso version:
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85
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86 loadtool> flash erase-program-boot compal-flash-boot-for-fc.bin
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87
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88 * Flash whichever FreeCalypso firmware image you would like to play with, e.g.:
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90 loadtool> flash erase 0x10000 0x230000
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91 loadtool> flash program-bin 0x10000 fwimage.bin
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92
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93 Please note that the image size will be different depending on which
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94 configuration of which FC fw project you would like to play with, so adjust
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95 the second number in the flash erase command accordingly - it needs to be
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96 the fw image size rounded up to a 64 KiB sector boundary.
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97
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98 * Erase the flash sectors to be used for the FFS (flash file system) by
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99 FreeCalypso firmwares:
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100
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101 loadtool> flash erase 0x3C0000 0x30000
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102
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103 * Exiting fc-loadtool cleanly will cause it to power off the phone:
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104
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105 loadtool> exit
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106
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107 Reflashing between different FreeCalypso firmwares
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108 ==================================================
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109
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110 By the conventions established in the FreeCalypso project, all of our firmwares
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111 for the C139 target have the following in common:
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112
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113 * They all stay out of the boot sector and expect to receive control from the
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114 boot code in the same manner (boot entry point at 0x10058, exception vectors
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115 at 0x10000), thus there is no need to reflash the dangerous boot sector when
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116 going from one FC firmware to another.
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117
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118 * They all use the same aftermarket FFS configuration of 3 sectors of 64 KiB
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119 each (64x3) at 0x3C0000. This FFS location is deliberately different from
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120 the one used by Mot/Compal's firmwares, eliminating the possibility of one fw
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121 trying to use the FFS created by the other, and by putting our FFS toward the
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122 end of the flash we maximize the amount of flash space available for our
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123 firmware code images. But even though we don't share our FFS with
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124 Mot/Compal's official firmwares, we do share the same FFS between all of
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125 FreeCalypso firmware projects - thus once you have initialized your FFS (see
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126 below) with one FC firmware version, it will work with the others as well.
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127
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128 If you need to reflash your C139 from one FC firmware version to another,
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129 simply get in with fc-loadtool -h compal (no more need for the inefficient
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130 -c 1003 or -c 1004 options or for tfc139) and reflash just the fw image part:
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131
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132 loadtool> flash erase 0x10000 0x230000
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133 loadtool> flash program-bin 0x10000 fwimage.bin
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134
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135 First boot of the firmware
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136 ==========================
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137
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138 Connect the serial cable, but instead of running fc-loadtool, run rvinterf.
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139 Press the red power button on the phone briefly just like you would for
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140 fc-loadtool entry. Because there is no fc-loadtool running on the host end of
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141 the serial cable, the boot path will *not* be diverted in the bootloader, and
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142 the main fw image will run - and this time it will be the FreeCalypso firmware
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143 you have compiled and flashed. If the fw you have flashed is the UI demo
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144 configuration, the phone must have *NO* SIM in it the first time you boot it.
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145 UI-enabled fw configuration automatically bring up the GSM radio and try to
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146 connect to the default network on boot if there is a SIM present, and you don't
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147 want your firmware trying to connect to a real live GSM network when you haven't
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148 initialized your FFS yet. If the fw you have flashed is one of the AT-command-
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149 controlled pseudo-modem configurations, then you don't need to worry if the SIM
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150 is there or not on your first boot - just don't command it to connect to a
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151 network until you have initialized the FFS.
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152
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153 If you have flashed a non-UI firmware version, the phone's LCD will remain dark
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154 as there is no LCD driver code in this firmware, but you will see trace output
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155 in the rvinterf window, telling you that the fw is running.
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156
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157 Before you do anything else, you will need to run fc-fsio and initialize the
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158 aftermarket FFS for our firmware:
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159
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160 fsio> format /
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161 fsio> mk-std-dirs
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162 fsio> set-imeisv fc XXXXXXXX-YYYYYY-ZZ (punctuation optional, place anywhere)
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163 fsio> set-rfcap dual-eu (if you have 900+1800 MHz hardware)
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164 or
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165 fsio> set-rfcap dual-us (if you have 850+1900 MHz hardware)
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166
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167 After you've initialized your FFS as above, you should exit fc-fsio, and your
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168 next steps will depend on which fw configuration you are playing with. If it's
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169 the sans-UI pseudo-modem configuration, run fc-shell and try some AT commands:
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170
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171 AT+CMEE=2 -- enable verbose error responses
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172 AT+CFUN=1 -- enable radio and SIM interfaces
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173 AT+COPS=0 -- register to the default GSM network
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174
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175 When you are done, you can power the phone off by sending a 'poweroff' command
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176 through fc-shell. The only other way is to yank the battery, and doing the
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177 latter is recommended anyway: when a phone with the present hack-firmware
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178 flashed into it is powered off but still has the battery inserted, even a
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179 momentary accidental press of the power button will cause it to power on and
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180 boot, but there will be absolutely no visual indication, as the LCD stays dark.
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181
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182 If you are playing with the UI demo firmware, after you have initialized your
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183 FFS, you can power the phone off with the power button, insert a SIM, power it
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184 back on and play with the primitive UI.