Use this tag for questions related to the cellular radio communication in a device (not necessarily the firmware)

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42
votes
1answer
136k views

What is *Cell standby* and how can I keep it from eating my battery?

Looking up my battery statistics, I almost always find Cell standby amongst the top consumers: I never thought that "idle" would use so much energy. I saw that other people encounter similar ...
1
vote
1answer
298 views

How to turn off cellular radio in Lollipop/JellyBean using adb?

I've been trying to find out how to kill/turn-off cellular radio (on a rooted device) using some command on ADB. My research only found that I should either (using GUI) enable Airplane Mode, or type ...
5
votes
3answers
32k views

Change WCDMA to GSM automatically

I have Samsung Galaxy S II with Android 4. If I configure my phone to GSM/WCDMA (automatic) mode, I have problems when I receive or make a call. Usually I lost the call or the other person cannot ...
2
votes
1answer
2k views

Multiple force closes

I have intermittent issues with multiple apps forcing closing. This has happened on both my current ROM (Miui) and every version of Cyanogenmod I've tried. Usually this problem crops up again a few ...
1
vote
1answer
2k views

How to use AT commands in Android by 'root' the phone

We have various Android devices from Spike, Samsung, Micromax, etc. How can we issue AT commands from Android to the modem? We searched in Google Play but did not find any app related to this. This ...
5
votes
4answers
535 views

Can my phone act as WiFi Access Point while Disabling Celluar Radio?

Can Android act as a WiFi Access Point while the cellular radio is turned off? I tried to accomplish that using flight mode, but that won't work. While flight mode is enabled, Androids portable Wi-Fi ...
2
votes
2answers
7k views

Install Ginger Yoshi 1.4 on HTC Magic 32a, which radio do I need?

My HTC Magic 32a is actually running CyanogenMod 6.1 and I'd like to switch to latest GingerYoshi 1.4 with GingerBread. I have SPL 1.33.2010 radio 3.22.20.17 The reason I want to change is because ...
4
votes
1answer
2k views

How do you turn off all cellular communication but leave things like bluetooth and wifi enabled?

I'm going to be traveling overseas and don't have an international roaming plan. I would like to disable my cellular radio while I am there but I'd also like to use bluetooth and wifi. I don't think ...
9
votes
2answers
2k views

Turn off cellphone (SIM) radio

How do I turn the cellphone (SIM) radio on an Android phone? The radio consumes a lot of power (30-70%), especially when the phone is idle. Sometimes I only need to use other functions (e.g., clock, ...
3
votes
4answers
6k views

Cellular data not working since 5.1 Lollipop flash

Cellular data stopped working immediately after "upgrading" to 5.1-lollipop OTA (from 5.0.2) on my Nexus-4. I am seeing the exclamation point in the signal strength indicator at all times, except ...
8
votes
4answers
18k views

What are these dumpstate logs?

So, these files were filling up my /data/logs directory, causing me to run out of storage space rapidly. What are they, why are there so many and how can I stop them clogging my storage? Screenshot ...
5
votes
3answers
592 views

What are the benefits of 2G+3G mode?

Some of the advanced power control widgets or 2G/3G switching widgets allow the following options for the radio mode: 2G 3G only 2G+3G What are the benefits of 2G+3G over running 3G only? Are ...
3
votes
2answers
6k views

Galaxy S3 cell standby is eating my battery

My battery on my new S3 seems to be being eaten up by the cell standby using more than 50%. I appear to get a decent signal on the phone. Does anyone have any idea why this figure would be so high?
1
vote
1answer
50 views

IM-A870L Radio Interface Layer broke down

I am having this weird problem with my Vega Iron since a couple of days. Past 2 days the battery was down and phone shut off. I put it to charging and when I came back after couple of hours, the led ...
1
vote
3answers
2k views

How to fix Telstra network dropouts on Gingerbread Oxygen ROM?

It's a long shot, but figured i'd give it a go.. I've installed the Oxygen RC6 ROM on my Telstra HTC Desire. It's pretty much perfect - better than this phone has ever been. It's fast, great to use, ...
-1
votes
1answer
397 views

Can an app detect a radio signal when running in the background with the phone in standby mode?

Also, could such an app detect a specific frequency (using either the cell tower antenna or wi-fi sniffer)? I would like to use a radio transmittor to activate an app to perform a function even while ...