Questions tagged [cellular-radio]
Use this tag for questions related to the cellular radio communication in a device (not necessarily the firmware)
81
questions
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34 views
debugging problem: phonecall recipients complain about audio quality
problem
Increasingly, recipients of my phonecalls complain that audio quality is too poor, mostly (but not entirely) when I'm calling from one location. I'd appreciate assistance identifying and ...
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0answers
23 views
Can I expect hardware components among devices of an individual model of Android to be the same across all devices of that model?
Can I expect specific hardware components of a device (camera, mic, ssd, etc...) to be the same among all devices sharing a model number (Galaxy Tab 2, Pixel 3, Nexus 6P) ?
Is this something that is ...
0
votes
1answer
48 views
app or widget or other solution for turning just cellular radio off/on
I recently acquired an umidigi one with android 8.1 oreo naked/stock image in place and voice over wifi as well as voice over lte support.
When device is in location with wifi connection, which is ...
0
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0answers
60 views
Modem,Radio,Baseband. Carrier tuned? Firmware - Samsung
I live in Australia and I know there's carrier firmware for Samsung phones Optus, Telstra, Vodaphone, and just XSA for Australia I would like to know if Optus, Telstra, Vodaphone specifically tune ...
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0answers
111 views
How to extract KC Key / IK / CK via AT Commands - RIL
I have been trying to extract KC Key / IK and CK by passing various AT commands to the modem in Android.
I am using a MTK chipset with a 4G GSM SIM Card. I am able to access the modem at /dev/radio/...
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0answers
30 views
Which component of the Android protocol stack performs cellular encryption?
I understand that the SIM Card plays a significant role in generating keys for the encryption and decryption of cellular traffic, but are these keys passed to the Android architecture so that it can ...
1
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0answers
29 views
How to enable the radio transmitter on yureka
So just a couple of hours ago, I unlocked the device's boot loader and after boot up, I noticed a strange app in the app drawer which was called radio transmitter. I excitedly opened the app. But, the ...
2
votes
0answers
71 views
Moto G4(XT1625)Funny behavior with sim card inserted
I have a Motorola Moto G4(XT1625, Amazon Prime Edition) on US Cellular. Data doesn't work(sim status screen shows connecting or disconnected but never connects), the signal fluctuates somewhat, and ...
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0answers
545 views
Unfortunately radio has stopped
Suddenly the built in radio application cannot be started anymore. I do not know if I changed something, but I couldn't find how to fix it.
What is the possible cause?
PS: I did a soft reset, and I ...
3
votes
2answers
222 views
Can I really tell where the tower is that I'm connected to?
I've been having some difficulty keeping a reliable connection at my house, so I installed the OpenSignal app to see what might be going on. According to its map, I live in a "hole" between several ...
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0answers
1k views
Can an android phone be converted to SDR using its radio hardware interfaces?
I have recently been reading about SDRs and based on what I have understood so far SDR consists of a radio hardware capable of transmitting and/or receiving radio signals within a given radio spectrum ...
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vote
2answers
2k views
Accidentally set radio to USA band
Accidentally set radio to USA band
I was playing around with ##4636## and accidentally set the radio band to USA Band. Now there's no way of changing it back so now I can't even connect to a network, ...
0
votes
2answers
105 views
In Google Voice, do all SMS messages have to be transmitted via a data connection?
If someone is using Google Voice, do they need a data connection (cellular or WiFi) to be on in order to send/receive any SMS messages?
This seems to be a big limitation, as keeping data on all the ...
3
votes
0answers
3k views
Cellular radio dead? No carrier signal, “No service”, no mobile networks
I own a Motorola Moto G 4G (XT1040). Original stock ROM, Android 5.1, unlocked bootloader, custom TeamWin recovery, rooted. I only install apps from Google Play, F-Droid or trusted sources.
Last ...
1
vote
1answer
274 views
Why can't my phone connect to cell network data?
I have a Nexus 6P running CyanogenMod 13.0-20160819-SNAPSHOT-ZNH5YAO0IN-angler based on Android 6.0.1. I used to be running a CM nightly build and my cell carrier is Ting. Here's what happened:
I was ...
1
vote
1answer
771 views
Marshmallow: Changing and connecting to an APN
Okay, before anyone can downvote this or anything silly, I need to clarify a few things:
This is for Android 6.0 (Marshmallow)
I'm using a FlashFire-Rooted Cherry Mobile One (technically called ...
0
votes
2answers
3k views
Is it possible to completely disable radio signal in a phone without a SIM card?
I have a Samsung Galaxy S4 Mini, powered by CyanogenMod 13 (Android Marshmallow 6.0.1), which I use as Wi-Fi only, being it without SIM card.
The device antenna, though, seems to be constantly ...
1
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0answers
26 views
Nexus 6 on T-Mobile loses ability to send texts. Factory reset does not fix
What is wrong with my mom's nexus 6. She was running stock Google Nexus software and kept encountering a problem where her texts would not send. I think I fixed it once by deleting the cache of some ...
0
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2answers
2k views
Can I flash a separate radio image and have a working radio?
I have a rooted LGE Nexus 4. Installed on it are the Team Win Recovery Project and CyanogenMod 13 (Android 6).
I found this guide to installing stock Android 6 onto a Nexus 4, and it provides pre-...
1
vote
1answer
72 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 ...
1
vote
0answers
1k 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. ...
6
votes
1answer
3k 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
2k 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 ...
1
vote
1answer
109 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 ...
5
votes
1answer
1k 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 ...
2
votes
0answers
664 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 ...
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vote
0answers
136 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 ...
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votes
3answers
3k 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
54 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 ...
0
votes
1answer
57 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 https://apple.stackexchange.com/questions/173894/can-i-connect-to-wifi-but-still-...
0
votes
1answer
78 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?
3
votes
0answers
278 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
2answers
621 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 ...
3
votes
1answer
7k 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
240 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 ...
4
votes
4answers
21k 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
6answers
13k 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
2answers
2k 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
2k 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
709 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.??
12
votes
6answers
81k 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
230 views
4
votes
2answers
6k 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|...
14
votes
5answers
42k 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 ...
3
votes
3answers
10k 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
40 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
1k 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
708 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
171 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 ...
