Send AT commands - Windows Mobile Software Development

Hello everybody.
I´m trying to send to the modem an AT command to send an USSD code but I´m having some troubles.
I open port number 2 (I think is the modem port...) and send ATD*121#\r
but using the atdbg program I get:
ERROR: Header error -<0> +<f1>
<Tx:19041D>
ERROR: Header error -<f1> +<ee>
ERROR: Header error -<ee> +<e8>
Tx:AT\r
ERROR: Header error -<e8> +<5b>
...
...
I know that I have to send ATD*121#\r to the modem because using atdbg when I dial directly the ussd command *121# code, I get ATD*121#\r.
What I´m not sure is the way to send it to the modem.
Any idea of how to do it or where to get information??
Thanks in advance and sorry for my english.

I´ve just read that I can´t open port 2 without crashing the communication between "celltsp.dll" and the gsm-module, so I guess that´s not the port to open.
How can I send then AT commands to the internal modem ??
Thanks in advance again.

check out the source of xdaunlock. that shows how to do this.

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I can't post in developer forum yet....
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well,thanks man for the sharing
valuable information may be usefull just in case
I always end up with 270 error.

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Hello There
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How to solve sahara protocol problem flashed on QFIL?

Good day.
I have one problem.
Can anyone please tell me how to solve this problem?
Now, i have a bricked mobile of "IQOO3 5G(V1955A)".
This mobile working only fastboot mode.
(But, It does not accept the command.)
Therefore, I'd like to flash the rom by myself.
i tried it by QPFL.
But, i found the below error message.
-----------------------------------------------------------------------------------------------------------
ERROR: function: sahara_rx_data:277 Unable to read packet header. Only read 0 bytes.
ERROR: function: sahara_main:983 Sahara protocol error
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-----------------------------------------------------------------------------------------------------------
could you give me some advice how to solve this problem?
*Sorry, My mother language is not English.
Therefore, I think my English is not clear.
I am grateful for your support.
How you managed to enter edl mode in this phone, through test points or via commands or buttons?
Ryü[email protected] said:
How you managed to enter edl mode in this phone, through test points or via commands or buttons?
Click to expand...
Click to collapse
+1
Ryü[email protected] said:
How you managed to enter edl mode in this phone, through test points or via commands or buttons?
Click to expand...
Click to collapse
I used test point.
First, I tried EDL cable and command.
but, It were not run.
gengas10 said:
I used test point.
First, I tried EDL cable and command.
but, It were not run.
Click to expand...
Click to collapse
Ok fine any success for now, because my phone has weird problem with VoLTE calling.
Send this phone to customer care as your phone is in warrenty
gengas10 said:
Good day.
I have one problem.
Can anyone please tell me how to solve this problem?
Now, i have a bricked mobile of "IQOO3 5G(V1955A)".
This mobile working only fastboot mode.
(But, It does not accept the command.)
Therefore, I'd like to flash the rom by myself.
i tried it by QPFL.
But, i found the below error message.
-----------------------------------------------------------------------------------------------------------
ERROR: function: sahara_rx_data:277 Unable to read packet header. Only read 0 bytes.
ERROR: function: sahara_main:983 Sahara protocol error
ERROR: function: main:320 Uploading Image using Sahara protocol failed
Download Fail:Sahara Fail:QSaharaServer Failrocess fail
-----------------------------------------------------------------------------------------------------------
could you give me some advice how to solve this problem?
*Sorry, My mother language is not English.
Therefore, I think my English is not clear.
I am grateful for your support.
Click to expand...
Click to collapse
I think customer care will fix the phone for free
gengas10 said:
Good day.
I have one problem.
Can anyone please tell me how to solve this problem?
Now, i have a bricked mobile of "IQOO3 5G(V1955A)".
This mobile working only fastboot mode.
(But, It does not accept the command.)
Therefore, I'd like to flash the rom by myself.
i tried it by QPFL.
But, i found the below error message.
-----------------------------------------------------------------------------------------------------------
ERROR: function: sahara_rx_data:277 Unable to read packet header. Only read 0 bytes.
ERROR: function: sahara_main:983 Sahara protocol error
ERROR: function: main:320 Uploading Image using Sahara protocol failed
Download Fail:Sahara Fail:QSaharaServer Failrocess fail
-----------------------------------------------------------------------------------------------------------
could you give me some advice how to solve this problem?
*Sorry, My mother language is not English.
Therefore, I think my English is not clear.
I am grateful for your support.
Click to expand...
Click to collapse
Maybe this may work press power and volume up and you Can then choose option repair os or something like that and you can connect your phone to wifi and your phone will download rom and fix itself.
tejHackerDev said:
Ok fine any success for now, because my phone has weird problem with VoLTE calling.
Click to expand...
Click to collapse
Now, I don't success the ROM flash.
If i will success it, I will write the method in this page.
kartikgupta599 said:
I think customer care will fix the phone for free
Click to expand...
Click to collapse
Thank you for your suggestion.
Actually, My country doesn't have a customer center.
Therefore, I'll communicate customer center any other country by mail.
kartikgupta599 said:
Maybe this may work press power and volume up and you Can then choose option repair os or something like that and you can connect your phone to wifi and your phone will download rom and fix itself.
Click to expand...
Click to collapse
Thank you for your suggestion.
First, i tried it.
But, My mobile didn't catch any AP.
Maybe, Wifi driver has broken or erased I think.
Therefore, I think If i can success the below things, I can install the ROM(OS).
1. Install the Wifi driver by any method(Command of fastboot moder or any method).
2. Put on the Rom file in the SDCARD folder by any method.
3. Install the OS with dedicated software.
If you have any idea, Please suggest to me.
Thank you for your cooperation.
gengas10 said:
Thank you for your suggestion.
First, i tried it.
But, My mobile didn't catch any AP.
Maybe, Wifi driver has broken or erased I think.
Therefore, I think If i can success the below things, I can install the ROM(OS).
1. Install the Wifi driver by any method(Command of fastboot moder or any method).
2. Put on the Rom file in the SDCARD folder by any method.
3. Install the OS with dedicated software.
If you have any idea, Please suggest to me.
Thank you for your cooperation.
Click to expand...
Click to collapse
Theres no sd card slot in iqoo 3
Theres a option in fastboot to repair system in which you can connect your phone to wifi and the fone will download the rom and install it.
kartikgupta599 said:
Theres no sd card slot in iqoo 3
Theres a option in fastboot to repair system in which you can connect your phone to wifi and the fone will download the rom and install it.
Click to expand...
Click to collapse
Thanks for your suggestion.
I tried it from recovery mode.
But, My phone can't find any AP address.
Could you advice me how to connect wifi from My phone?
gengas10 said:
Thanks for your suggestion.
I tried it from recovery mode.
But, My phone can't find any AP address.
Could you advice me how to connect wifi from My phone?
Click to expand...
Click to collapse
Contact me on insta @Beasttechnerd

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