"Global System for Mobile Communications". Used by phones on most carriers, but is specific to the make of phone. Most AT&T phones, for example, are GSM.

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2answers
885 views

Cyanogenmod no service?

I had cm-11-20150517-NIGHTLY working, then upgraded to cm-11-20150607-NIGHTLY. Now I get the error "No service" and have basically no GSM functionality whatsoever. If I attempt to select a network ...
3
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1answer
4k views

Can't tell if HTC One V is GSM or CDMA

I recently won an HTC One V and I want to sell it, but I'm not sure what carriers it supports. I won it from an HTC stand I went to, and all they said was that the phone was unlocked so that it could ...
3
votes
1answer
373 views

Cannot receive calls but can make calls on my tablet HCL ME Y2

I recently bought a HCL ME Y2 tablet with Android 4.0.3 (Ice Cream Sandwich) installed. It has a SIM slot and when I use the Phone dialer (the blue phone icon app), I can make calls over GSM but when ...
2
votes
1answer
123 views

How can I know what type of encryption is used by my mobile phone?

I'm interested in finding out what kind of cipher is used on my Android phone. For example A5/1, A5/3 or is the GSM connection unencrypted. I was thinking about sending AT commands to the GSM modem (/...
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1answer
59 views

How to deal with “short GSM IDs” in Tasker

My "cell near" in Tasker looks like this: GSM:4321.99011048 / 0 GSM:4321.99011052 / 0 GSM:4321 / 0 What is that short ID? If I take it out, my profile sometimes triggers as "leaving" even when I ...
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1answer
653 views

Does OnePlus 2 “DUAL SIM 4G” support dual 4G?

I've read that most dual-SIM phones can only use the other SIM for 2G voice service. Is OnePlus 2 DUAL SIM 4G any different?
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1answer
221 views

Issue in GSM for Straight Talk and MMS.

I just purchased a GSM unlocked Android phone. And called into Straight Talk to get the new APN setting. But, the settings they gave me would not allow me to receive MMS. The web and testing ...
2
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0answers
296 views

How to unroot a GSM Galaxy Nexus without reverting to the stock ROM

I recently rooted and unlocked the Bootloader on my Galaxy Nexus — direct from Google — using this method. Upon doing so my phone reverted to the stock Jelly Bean ROM I had just after upgrading. All ...
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0answers
30 views

Switch sim cards?

Up to about 3 weeks ago, I had a Motorola Moto X running Android 5.1 with Verizon/CDMA . Then I switched to a Nexus 5 running Android 6 with Ting/GSM. The Ting service is terrible it turns out, so I ...
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0answers
185 views

Android error - No SIM card/Emergency calls only

The problem: phone doesn't want to register in network. Android device shows No SIM card. After playing with menu *#*#4636#*#* it starts showing Emergency calls only. Phone displays available ...
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0answers
100 views

Droid turbo radio off when no signal happen, then can't turn radio back on

I just bought Droid Turbo (XT1225) from ebay, everything works fine except the radio, when the phone receive no signal for example in a lift, radio will turn off by itself and can't turn back on. The ...
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vote
0answers
65 views

Will an LG G3 Beat work on Verizon in the US?

I asked on Travel a week ago about getting a temporary phone for a trip to Europe but my requirements have changed. Now I need a phone that works in Europe and the USA. I got to looking at the LG G3 ...
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0answers
218 views

Check network availability using phone's modem (low level)

I am trying to find network availability using my phone's GSM modem. Last night I had almost done it using following procedure with adb shell connecting phone with Ubuntu laptop. Terminal 1 ./adb ...
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0answers
62 views

Nexus 5 and T-Mobile USA compatibility

I'm from Germany and I'm planing a trip to USA (Florida). I would like to use a t-mobile USA SIM card in my Nexus 5 (Build LMY47I + FCC ID: ZNFD821). On the T-Mobile site, I found it has to support ...
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0answers
757 views

GSM Rom To CDMA Rom

I have a marvelc (HTC Wildfire S CDMA) and was wondering if there is a way to convert GSM roms (for the marvel) to CDMA (for the marvelc). This rom looks nice but its for the marvel, not marvelc. I ...
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0answers
906 views

XYZ X1 Change band from 900 to 850

I just bought the XYZ X1 Android phone with GSM: 900/1800MHz, WCDMA 2100 MHz Unfortunately in my country are 850/1900MHz frequences. Is it possible to change the band on this phone? I've tried to ...