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

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52
votes
1answer
200k 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 ...
15
votes
7answers
3k views

How can I monitor and log data connection mode and rate, and log with location?

I would like to understand what connection type and theoretical data rate my phone is using for its data connection, and how it changes with different locations. I'm not looking for an actual data ...
13
votes
4answers
39k views

How to display cell info display (CID) on screen?

Does Android OS have an option for showing Cell Info Display (Name of the cell Tower) on home screen ? (Without using external apps)
11
votes
4answers
30k views

Can I permanently disable the cell/radio of my phone?

My wife got a new phone with a new service, so I get to have her old phone to play around with. Since the old phone no longer has cell phone service, I want to completely disable the cell phone or ...
9
votes
2answers
3k 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, ...
9
votes
5answers
15k views

Is it possible to force an app to use cellular data instead of WiFi? [duplicate]

Our local office provides free public WiFi for phones and tablets, but blocks access in ways that means that some applications (like WhatsApp) are unable to connect. Is there any way to configure ...
8
votes
1answer
323k views

What is the difference between GSM and WCDMA when switching to manual Network Mode?

I was reading this answer and I need to comprehend this better: What is the technical difference between "selecting GSM" and "selecting WCDMA" in Network Mode settings menu? To save battery life, I'm ...
8
votes
3answers
24k 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 ...
6
votes
2answers
3k views

Moto X has 5 models with different LTE bands. Does it matter which one I get?

I want to purchase an LTE phone for use with T-Mobile. According to Wikipedia model XT1053 is what I need... however it uses LTE bands that many of the other phones don't use. What is an LTE band? ...
6
votes
1answer
1k views

Can I use a radio firmware for GB (2.3.6) for my SGS1 (GT-I9000) if I have ICS installed?

I still have the original cellular radio firmware my phone came with (at least, I think I do. The baseband version is I9000BVJJPG). However, I've changed ROMs many times, and am currently using the ...
5
votes
2answers
963 views

Is it possible to turn of the GSM radio and still use data connection?

I recently starting using a Samsung Galaxy S4. I need to use a special phone at my work. For that purpose I have a duo card where I turn off one phone to use the other. The problem is that I can ...
5
votes
3answers
650 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 ...
5
votes
3answers
38k 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 ...
5
votes
1answer
2k views

Why does my phone say “Verizon Wireless” when I receive a phone call?

Whenever I receive a phone call on my DROID RAZR MAXX, the phone speaks the words "Verizon Wireless" in a female voice and then begins playing the ringtone. If I put the phone into airplane mode, the ...
5
votes
6answers
4k 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 ...
5
votes
1answer
97 views

Display Name of Connected Cell Tower

On older Nokia phones, the name of the cell tower you were connected to was displayed, often the name of the neighborhood you were in. Is there a way to view this data now?
5
votes
3answers
991 views

Determine strength of the cell antenna in an Android phone to ensure good cell reception

In some parts of the world, the cell towers are few and far between. In places like these, when someone is shopping for their next smartphone upgrade, they need to consider cell reception. Boosters ...
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 ...
4
votes
2answers
273 views

Does Gingerbread use extra battery power to make calls when the phone has poor signal?

Since I got this phone (Galaxy S, originally on Eclair, then Froyo) and switched network provider, I've had major problems with the signal at home, and call quality as a result. Following the upgrade ...
4
votes
3answers
9k views

How can I find out which bands my phone supports

Background: I recently bought the Padfone X, and have been attempting to get it on my network. Part of this effort has been verifying information I have found online which claims that it supports LTE ...
4
votes
4answers
19k 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 ...
4
votes
1answer
3k views

DC-HSPA Cellular Standard Indicator

I have recently picked up a Nexus 4, on a carrier with a good DC-HSPA network (3 in the UK), and I want to check out the speed on that network. However, I don't know whether my phone has even picked ...
3
votes
2answers
18k views

Turn off cell standby?

I have a Droid Charge, but I live overseas and it's not an international phone so I can only use it for wifi. It is constantly searching for a signal that doesn't exist and it's eating my battery up! ...
3
votes
2answers
7k 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?
3
votes
0answers
219 views

My phone is not connecting to the cell network (No Service)

I have an Android KitKat based phone. For over a week the phone is getting poor (at times) or no reception but the WiFi and bluetooth is working. There is a cross near where the range is shown and I ...
3
votes
0answers
171 views

Nexus 5 Lollipop losing cell signal when wifi connected

I believe I first noticed this when I got version 5.1, and am still getting the issue with 5.1.1. If I keep the phone with wifi off, the phone works fine. If I connect to a wifi access point, at first ...
2
votes
1answer
2k 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 ...
2
votes
2answers
2k views

Interpretting the output of dumpsys telephony.registry

So when I run the command dumpsys telephony.registry | grep -i signalstrength I get the following output: mSignalStrength=SignalStrength: 99 0 -120 -160 -120 -1 -1 25 -93 -12 300 2147483647 gsm|...
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 ...
2
votes
1answer
61 views

Can you use cell tower triangulation without a SIM card?

Since cell phones can call 911 without a SIM card present, it is clear that they can connect to a cellular network to which they are not subscribed. Is it possible to use this knowledge to do cell ...
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 ...
2
votes
1answer
1k views

Where the driver for CDMA/GSM hardware?

i.e. I have a phone in CDMA from HTC, who provides the CDMA hardware driver (radio-firmware ?),Google Android source tree or HTC? If the driver is provided by Google Android source tree, then I can ...
2
votes
0answers
15 views

Galaxy S4 refuses to gain signal after being disconnected for a period of time

So, the scenario is this: I have a Verizon Galaxy S4 (SCH-I545, Android 5.0.1). One of my work sites is an amazingly effective dead zone. No signal whatsoever. If I enter the dead zone for a few ...
2
votes
1answer
3k views

HTC ONE X: The process “com.android.phone” has stopped?

I have just brought a Second had HTC ONE X from an auction site, When booting up the phone it works fine, with no sim card. However I have a 2degrees (New Zealand) Micro SIM which is a snapper sim I....
1
vote
1answer
126 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
1answer
421 views

After activating the device encryption on my S2 running CM 10.2 nightly, my CDMA radio stopped working

I have a Samsung Galaxy S2 (Sprint, codename d710), and I just installed the latest CM nightly (10.2). Everything worked until I encrypted the device. Now the radio doesn't work (network: UNKNOWN, no ...
1
vote
1answer
3k 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 ...
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
vote
0answers
77 views

How does SIM lock work?

I'm considering buying a network-locked phone and unlocking it myself (cheaper than buying an unlocked phone). I'm wondering where Android phones store information about what networks to connect to. ...
1
vote
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 ...
1
vote
0answers
63 views

Having problems with carrier activation and connecting to cell network

I have a Sprint HTC One (m7wls) and recently switched over to Ting. I was using Cyanogenmod and couldn't use Ting's instructions for activating with them, so I used an RUU from HTC to get back to ...
1
vote
1answer
173 views

What are radio_dump .bin files? Can I delete them?

Each radio_dump_xxxxxxx.bin is 37MB in size.
1
vote
0answers
695 views

Is it possible to turn off radio without turning of wifi on Lenovo k900? [duplicate]

I am currently having a look at the power consumption of a lenovo k900 phone and on the hardware side it seems Radio and Screen is using most of the power. I am planning to use wifi but not the radio....
1
vote
0answers
2k views

Samsung Galaxy S3 “Not registered on network”

It had stock 4.0.4 -> could call. I've flashed FoxHound ROM -> after a while, when I try calling, it says "Not registered on network" . Tried GalaxSim, but everything looks ok. Restored back to ...
0
votes
2answers
150 views

Turn off radio layer hardware calls to save battery when your broadband hardware is gone

With reference to my question here: IM-A870L Radio Interface Layer broke down Summary: My android phone broadband chip is dead. For some reason, its not working anymore. Now I can use the phone for ...
0
votes
2answers
1k views

Enable LTE on Nexus 6 with Lollipop

My new Nexus 6 isn't giving me an LTE icon in my cell service - I get the same old H that was showing on my Nexus 4 before I upgraded. I'd expect to see LTE here : I talked to my carrier, who said ...
0
votes
2answers
4k views

How to disable RIL on Android?

As soon as I connect a USB modem to android device, system grabs ttyACM0 and ttyACM1 in an attempt to open connection. As a result, the ports are blocked and can not be opened by other services. How, ...
0
votes
1answer
15k views

Why are Dialer, Cell standby, and Phone idle killing my battery?

HTC G2 with Cyanogenmod 7.2.0, T-Mobile. It used to last all day, I'd always plug the phone in before bed and it would rarely run out of energy before then. Lately it runs out mid-day. Today I ...
0
votes
1answer
4k views

Phone Radio uses 80% of my battery

I have GSam Battery Monitor, and it says that my Phone Radio is using about 80% of my battery. Why is this so high? I usually unplug my phone in the morning at 8AM, and I usually need to plug it back ...
0
votes
1answer
577 views

Flashed ICS i9020T image onto AT&T I9020XXKI1 baseband phone now intermittent WiFi

I flashed a Nexus S i9020T Android 4.0.3 package image onto my AT&T Nexus S. The flash was a success, but the wi-fi is intermittent. It will come on for a bit, but then lose connectivity. In ...