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

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0
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0answers
14 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 ...
3
votes
0answers
135 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
40 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 ...
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
162 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
48 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
votes
1answer
326 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
0answers
10 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 ...
1
vote
1answer
19 views

World Phone supported bands [closed]

I came here after a vain search to ask those questions: What exactly the "World Phone" stands for ? or is it just a marketing term. Which bands are supported for GSM / UMTS / CDMA & LTE to say ...
0
votes
1answer
36 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 ...
1
vote
1answer
44 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?
2
votes
0answers
144 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
0answers
114 views

Radio power error, Caterpillar CAT S50, com.android.internal.telephony

A couple of days ago, my phone lost gsm network. I did not have time to deal, and I put the SIM card in another phone. Other Phone joined the network at once. My sim card is new, I bought it two weeks ...
0
votes
2answers
118 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 ...
1
vote
1answer
1k 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 ...
1
vote
1answer
108 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 ...
0
votes
0answers
29 views

Xperia Mini Pro, CyanogenMod 9, drops cell carrier connection regularly

My Sony Ericsson Xperia Mini Pro runs CyanogenMod 9 (Android 4.0.4) and has the new habit to drop the cell carrier connection regularly. So I pick it up, and it shows that it has zero coverage and ...
4
votes
4answers
17k 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 ...
5
votes
5answers
2k 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 ...
0
votes
1answer
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
1answer
907 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
298 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.??
3
votes
2answers
6k 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 ...
1
vote
1answer
151 views

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

Each radio_dump_xxxxxxx.bin is 37MB in size.
2
votes
2answers
1k 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 ...
7
votes
5answers
11k 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
2answers
3k 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
0answers
36 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 ...
-1
votes
1answer
564 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 ...
1
vote
0answers
692 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 ...
1
vote
0answers
149 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
399 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 ...
5
votes
3answers
831 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 ...
6
votes
2answers
2k 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 ...
5
votes
2answers
852 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 ...
8
votes
3answers
22k 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 ...
2
votes
2answers
15k 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! ...
4
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 ...
0
votes
1answer
14k 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 ...
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 ...
14
votes
7answers
2k 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 ...
11
votes
4answers
26k 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 ...
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 ...
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 ...
51
votes
1answer
172k 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 ...
5
votes
3answers
36k 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 ...
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 ...
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 ...