"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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3answers
2k views

My phone not registering to 2G (GSM only) network

I am using a Sony Xperia Neo L (MT25i). After updating the OS, my phone not registering to 2G (GSM only mode) network. It works perfectly with 3G (WCDMA only or WCDMA proffered mode) network. While ...
3
votes
1answer
299 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
3k 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 ...
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1answer
1k views

How can I enable field test mode on Samsung Galaxy S3?

I have a Samsung Galaxy S3. Are there any codes to enable field test mode, like band selection? Has someone managed to enable such an option?
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1answer
153 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
votes
0answers
289 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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vote
0answers
147 views

Android phone not detecting mobile operator

I've this problem with my new Sony Xperia L Android phone running on Jelly Bean. The phone has been working well for one week now, but as of recently, when I turn on the phone, it doesn't connect to ...
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0answers
127 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
17 views

GSM International Galaxy HELP

I have a GSM Unlocked Galaxy MEGA, but it's all in Chinese letters. I factory reset the phone but it still had the chinese apps and everything. It is also missing some device apps like the Play Store. ...
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0answers
38 views

Difference between GSM/Sprint/Verizon

Sorry, stupid question: How can I tell whether my Samsung Google Nexus is Sprint, Verizon, or GSM? I can't turn on my phone (bricked), so this guide is useless to me (or at least I really don't ...
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0answers
31 views

How to debug outgoing SMS's?

My phone isn't able to send messages any more and receives CMS error 21, which indicates that my provider is blocking them for some reason. It looks like I'm out of money, while this isn't the case, ...
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0answers
358 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
450 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 ...
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0answers
578 views

android network provider always returns longitude value as -1.0E-5 but latitude value seems ok (e.g. 37.56003)

One android LBS app on HTC wildfire A3366 (G8) with android v2.2 (including google GMS service package), while using the GSM SIM card of China Mobile always runs great to get valid network geolocation ...