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

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1
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0answers
13 views

Find out available mobile network bands in my area and disable scanning for unused bands

I have an HTC 626g+ which was supposed to be released in India, but I'm using it in Russia, which probably has different cellular frequencies available. I've read on certain forums that smartphones ...
0
votes
0answers
17 views

Cannot un-set home only (no roaming) mode

TL;DR: On Moto X Pure Edition, if you lock out roaming, you cannot restore its ability to roam. Detailed version: I have a Moto X Pure Edition (2015 version) running on the Sprint network. I am ...
2
votes
1answer
4k 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....
0
votes
1answer
58 views

How do I troubleshoot inconsistent call quality?

I have a OnePlus One phone that has worked great for a long time, but for the past few months, my call quality has been inconsistent. I am on the newest stock rom - Cyanogen12.1.1-YOG7DAS2K1, build ...
1
vote
0answers
136 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. ...
4
votes
3answers
11k 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 ...
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
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 ...
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 ...
13
votes
4answers
40k 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)
5
votes
1answer
110 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?
-2
votes
2answers
832 views

Why won't Android switch between wi-fi and 3G seamlessly?

I don't even know whether this is a good question. But it's annoying me and I don't get why it works so badly for me, and it's annoying me that I don't get it. Point is, when switching from one ...
2
votes
1answer
90 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 ...
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 ...
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 ...
3
votes
0answers
245 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 ...
1
vote
0answers
135 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 ...
2
votes
0answers
16 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 ...
3
votes
0answers
178 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 ...
0
votes
1answer
2k views

Will the 2015 Nexus phones (5X, 6P) work with any US cell provider? [duplicate]

I'm pretty geeky, but I haven't really followed all the tech behind LTE rollouts and wireless bands and whatnot. I barely know the difference between CDMA and GSM. I know Verizon didn't use a SIM and ...
0
votes
0answers
222 views

“No Service” after device shutdown - software or hardware issue?

I own an LG P880 (Optimus 4X HD) device running cm-11-20150824-NIGHTLY, which was installed about a month ago and worked fine so far. Followed by low battery the device was automatically turned off. ...
1
vote
0answers
67 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
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
158 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
1answer
1k views

bootloops / random restarts on Note 2 LTE, worse with SIM inserted? analyze kernel log “last_kmsg”?

when I started using my Note 2 LTE with an LTE sim card (tested LTE long ago without problems), running CM11 nightly from approx. 1 month ago, it started to reboot randomly. But it also happened with ...
0
votes
1answer
40 views

Use cellular when connected to wifi

Is there a possibility to force an android phone to use cellular data when connected to wifi. For iOS I've found this http://apple.stackexchange.com/questions/173894/can-i-connect-to-wifi-but-still-...
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
59 views

Is my android when turned on constantly sending radio data to my provider? [closed]

Is my android when turned on constantly sending radio data to my provider so he can track me, or only when i am actually using the network by surfing or calling someone?
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 ...
1
vote
1answer
134 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 ...
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 ...
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 ...
4
votes
4answers
20k 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 ...
3
votes
2answers
19k 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! ...
5
votes
3answers
1k 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 ...
0
votes
1answer
359 views

Cell standby use about 35-50% of total battery? [duplicate]

I have Micromax canvas 2.2 a114. I am in strong network zone and use 2g internet all time and time without network is 0%. So why it is consuming more battery. I also never in weak signal.??
1
vote
1answer
179 views
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|...
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 ...
0
votes
0answers
37 views

Does 3G has to start and stop with every transmission? (energy overhead)

Does anyone know what has to happen for 3G to send some data (when 3G is on in Android settings, using Nexus 4)? Does it has to initialize somehow at the beginning or to go back to some stable mode in ...
4
votes
2answers
274 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 ...
-1
votes
1answer
658 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 ...
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, ...
54
votes
1answer
209k 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
0answers
700 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....
0
votes
0answers
153 views

How to disable/remove ALL cell functionality

I have a Kyocera Event (Virgin Mobile) running stock Android 4.0.4. This is only used as a media player for about 90 minutes ONE DAY per week. I am looking for a good way to extend battery life as ...
1
vote
1answer
424 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 ...
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 ...
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? ...
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 ...