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5

Based on avirk's hint, I found a way. First press the code *#0011# GSM example: GSM900: IDLE T: 10, B: 10 Rx Pwr: -94, Rx ual: - Rx Lev: 21, Tx Lev: 0- Speech VER: AMR EFR FR VOC: AdaptiveRate TS: 0 Temp: 68 Batt: 71 LNA: 0 Service: Available It is obvious that it's using 900MHz band, from the "GSM900". UMTS WCDMA example: WCDMA: Idle Rx CH: 10612, R: ...


3

There are two levels of technical reason why this wouldn't work. Not all mobile phones allow the software to control the audio that gets sent over a voice call: the microphone feeds directly into the cell radio. This is the same reason that apps to record calls or play sound over calls don't work on every phone. GSM lossily compresses the sound signal ...


2

Looking at this, GSM:900/1800/1900 Mhz,3G TD-SCDMA 2010-20250 MHZ And scrolling on down a bit on that page under the 'Data Application Features'... Data Service GPRS;EDGE;TD-SCDMA That would explain it, no UMTS/HSPA/HSPA+ mentioned in the spec of that hardware, as that would be required to have T-Mobile operating to enable 3G data. It may be ...


2

Not going to happen. Sorry. While MSM8655 supports GSM - Play Verizon's version of radio software makes no use of it. You can not reflash the radio software because the bootloader is locked. And even if you could - the GSM bands are not "phased" in your phone. "Phasing" is a process of calibrating the phone during manufacturing - without it you would get no ...


1

The following is no complete solution, but at least a work-around, avoiding a long reboot: There are apps like Quick Boot (others have things like "fast reboot" and the like in their names/descriptions). Other suggested by those names, they do not really reboot your device, but simply restart the system server (for details, please take a look at Can ...


1

Some devices would have the kernel compiled with ACM serial support (this is dependent on manufacturer/board/kernel) so that it could be used as a dial-up modem from a PC via USB cable, that is the functionality behind /dev/ttyACM n where n is a digit as allocated by the kernel. To check for that, look in /proc/config.gz which is the kernel configuration ...


1

As I said in my answer to your first question: Be warned that the device file you need to use is different for each model of phone, so you'll have to examine /dev on each device to find out which file to use. If you can't find a report from someone else who has got it working on the same phone, you'll need to use a little trial and error to find the ...


1

You are right in that it theoretically should be possible to make the switch without dropping the signal, but unfortunately we users and even CM developers can do very little to change that. The only thing the ROM does is tell the radio to switch from one mode to another, it's up to the radio's firmware to decide how to make the change. These firmwares are ...


1

Yes and no. The hardware is capable of sending/receiving GSM calls and texts but there's no way to do with via the stock software. I doubt any after market app would do the trick either, as it appears that tweaks need to be made at the OS level. There are a couple of devs working on this on XDA. There's no eta, but they should get it done in time. We can ...


1

You can try dialing *#*#4636#*#* and then going to "Phone Information". That will show details about the network like cell tower ID and network type. As you can see from the below screenshot, it shows "EDGE" mode :- Also, this may only work on stock Android builds.



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