Questions tagged [signal]

This tag deals with reception issues, which can apply to a variety of radio signals such as cell radio, WiFi, and others.

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23 views

Detect blacklisted phone's presence

Okay, so basically i need a way to alert me if someone unwanted is around me. I mean I'd have a list of whitelisted people (devices). If anyone except these are found around i want the app to alert me....
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1answer
38 views

Signal Private Messanger - Permissions?

RedPhone and TextSecure was migrated to Signal, but I'm a little bit worried about all the permissions Signal app requires. Why does signal require ex. location and calendar? I have tried to search ...
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48 views

How can I increase my samsung galaxy s4 signal power

I'm having poor signal quality from service provider(the signal for recieving calls, messages etc.) When I check from "about device" section, it usually says around -110 dbm and 2 asu. I have no ...
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1answer
367 views

Bluetooth signal strength bug with my car's stereo

i have problem with xiaomi mi a1 and bluetooth radio of ford fiesta car. I connected an Android phone to a vehicle via bluetooth to make/receive calls. Connecting the device via bluetooth was ...
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147 views

App to measure current GSM signal strength for ALL carriers

Is it technically possible to measure GSM (or 3G/4G) signal strength of all available carriers/providers/operators (not only the one of my SIM) ? If so, is there an app that is able to do this ? I ...
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62 views

Cannot change mobile network Sony Xperia V

I have a Xperia V device which worked fine until few days ago. I still use 3G SIM, and I've enabled WCDMA(preffered)/GSM from settings menu (Settings->More>Mobile Networks->Network Mode). This works ...
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660 views

Cannot Restore Data for Signal Messenger 4.16 with Titanium Backup

I have backed up and restored Signal with Titanium for years without any incident, up until now. The other day I was encountering a boot loop playing around with an Xposed module. I did a re-flash of ...
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54 views

How to register/invite a communication partner in Signal on LineageOS?

I used Signal once on CyanogenMod and it didn't make me think during the registration. Now that I want to recreate a secure communication with my previous communication partner on LineageOS (OS ...
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20 views

What is this symbol on top of my service bar? [duplicate]

On my Galaxy s5 There's my Cell signal (2 bars), there's my Mobile Data (4G LTE). But what is that strange symbol on top of the bars, I've never seen it before (I don't see it on my other phone or ...
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1answer
467 views

What information can you extract from Wifi networks without connecting?

Android newbie here. I am not talking about eavesdropping wifi traffic, but accessing publicly broadcast information. When you open the list of available wifi networks, that means Android is ...
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251 views

Sony Xperia Z3 - Lollipop - Signal bar disappeared, no SIM would work

I'm experiencing problems with my 2 yo Sony Xperia Z3. Today i've changed the SIM card from polish T-Mobile to Orange (I've been using Orange for alot of time, even this particular SIM, and 1 month ...
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1answer
2k views

RSSI range for WiFi icons

What is stock RSSI range for the WiFi indicator icon in notification bar? Example ranges: 0 bars   -100 to -70 1 bar     -70 to -55 2 bars   -55  to -45 3 ...
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1answer
980 views

LG G2 - No SIM and network also after hard reset

I have a problem with my LG G2 (D802). It shows, without reasons, no network signal and no SIM. I do an hard reset but nothing changed. What's the problem?
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1k views

Acceptable Signal Strength Ranges for 2G/3G and 4G

I have been logging signal strengths on my phone and am trying to understand what ranges can be considered "Good" and "Bad". RSSI is a measure of signal strength for GSM (2G/3G): -50dBm to -113dBm ...
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1answer
2k views

Does Titanium Backup backup the Signal private Key?

I am looking for a way to backup my private key for the Signal messenger application. Nothing has worked so far, and I am curious whether anyone can confirm or deny that Titanium backup will save and ...
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0answers
2k 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 ...
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1answer
32 views

Network disconnecting after returning from flight mode

Device: LG G4 with android 6.0 When I turn flight mode off, after a few seconds I get reconnected to my mobile carrier network. After a another few seconds though, the network disappears (showing '...
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1answer
879 views

Auto refreshing the signal

When we go to the area where signal is not reachable, we experience "Emergency calls only" or "No service". But after coming-out from that area we sometime found phone is not receiving signal and ...
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0answers
35 views

Unique signal problem - No one heard of such problem

I am using honor 4x from past 1 year. From last week I am facing a unique issue. SIM 2 signal is not working with Vodafone in some areas of the city (for example it will not work in my home). ...
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1answer
113 views

How will I know the signal strength of my smartphone's 3g?

How will I determine the signal strength of my smartphone's 3G whether strong or weak?
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1answer
104 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 ...
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0answers
2k views

Mobile data can't connect (with exclamation mark) but wifi

My phone is Motorola XT1033 dual-SIM (Lollipop 5.1) * have active mobile-data internet packages * can connect and open provider's website (to check package status & quota) * valid APN settings (...
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1k views

Lost 3G/4G signals, 2G works only; factory reset or downgrade or changes in network settings didn't help

I have a Samsung Galaxy S4 LTE working on Lollipop and I completely lost the 3G and 4G signals. I can only use the 2G signal. When I choose in the network options (Only HSPA) there's a stop like ...
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2answers
6k views

How are good, fair, poor and bad defined for signal strength?

How are good, fair, poor and bad defined for signal strength in terms of dBm, in most Android phones or telecommunication community? Are they defined the same for mobile network and for WiFi network? ...
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2answers
5k views

How to set signal strength threshold for switching WiFi on and off?

When the WiFi signal strength is low, the phone switches to a 4G network. When the WiFi signal strength is high, the phone switches to that WiFi network. This is normal behavior for any Android ...
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0answers
53 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 ...
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1answer
41 views

What would happen if the kernel was somehow modified to avoid sending the shutdown signal?

I'm assuming a signal is sent when the battery reaches some critical level. If that signal was programmed to be ignored somehow, what would me most likely to happen when the battery depleted its ...
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1answer
628 views

How to differentiate between a full signal icon and an empty signal icon on my Andriod Device?

My question is not a duplicate of this post as in that the OP is asking for the difference between the network icons for a rooted device whereas mine is for mobile signal icons in an un-rooted device....
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2answers
822 views

Can you restart data service with full strength & orange indicator?

With some regularity (6-7 times per month) my Android 4.4 phone gets into a data-wedged state where the connection is shown as full-strength LTE, but without connectivity (the icon is orange in the ...
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1answer
19k views

Can I increase signal strength on my Samsung Galaxy s4 active?

I recently purchased a used Samsung Galaxy S4 that used to be on AT&T, but it has been unlocked, or something so that I can now use it on Koodo (canadian carrier). The signal is very weak. It's ...
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1answer
6k views

Convert signal strength to dbm

I've got this app which shows network signal strength as a positive integer value btw 5 and 35. Another app uses negative integers like -99dbm. Is there a way to convert the positive values (unit ...
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1answer
1k views

Samsung Galaxy SHV-160k won't get signal

I bought on ebay a refurbish Galaxy Note N-7000. Once I received it I put my chip and for my surprise there was no signal. After checking It I noticed it has on the back of the phone N-7000 but when I ...
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1answer
704 views

On the verge of 3G reception — how to find the best position

In my apartment, it seems like I'm on the verge of having 3G reception with my current carrier. It's only if I place and leave my Galaxy Nexus on the window, and in a certain position and time of day,...
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1answer
232 views

Any way to reduce the frequency of searching for a signal

My fiancee just got my old SGS2 when I got my new N5. The problem that she's having is that there is no cell reception at her work. And because of this, her phone is constantly searching for a ...
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0answers
68 views

Can 2 smartphones malfunction if they are hold together in the pocket for long times everyday?

I apologize for my ignorance but I am not very tech savvy. Basically I do a field job and I always have 2 phones in one of those bags you put around your waist. I had 2 Samsung galaxy S2 in the ...
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1answer
2k views

GSM signal lost - howto get signal back without restarting

Several times a week I have the problems where the GSM signal is lost on my phone, due to bad coverage in that area. The real problem for me is that when that happens, and when I move to a place with ...
6
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3answers
2k 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 ...
19
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2answers
36k views

What are the different signal indicators avalable on the notification bar?

The signal indicator on my phone often shows "3G" or "H+" in the signal indicator. When there's no connectivity it doesn't show anything. I'm referring to the icons in the status bar like these: ...
2
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0answers
93 views

How does android (stock) calculate the number of bars representing mobile signal quality?

I am interested in how Android (assuming unmodified AOSP code) calculates the number of bars representing mobile signal quality? Also, if you know the place in code where this is done, I would ...
6
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3answers
17k views

Where is the backup folder of TextSecure and Signal?

In TextSecure, you can choose to backup your SMS to the SDCard. It says "Success" but there is no evidence where it does store it on the SDCard. I cannot find it.
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1answer
2k views

No signal on custom roms (SGS2+)

I have a Samsung Galaxy S2 plus and rooted it via Odin and put CWM on it, with which I installed the unofficial Cyanogenmod ROM and later P.A.C. Unfortunately I had massive issues with the signal: ...
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4answers
12k views

What causes my Android phone to heat on low signal

I have noticed that 3 of my Android phones heat on low signal (Nexus4, Xperia U, and HTC One) 40~50C. My friend has an iPhone and it doesn't seem to heat as much (30C). So, why does this happen? Why ...
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4answers
1k views

Does GPS signal quality influence battery life?

Does bad/weak GPS signal affect battery life? For instance, when in the city downtown with lots of tall buildings or in the woods or mountains, will running GPS drain the battery faster?
3
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4answers
32k views

Why is device not showing the phone signal bars anymore?

It's been happening for a while now but I've just gotten around to posting this issue. I'm running Cyanogenmod 10.1 on my Galaxy Note 2 but one fine day, it stopped showing me the signal bars. I've ...
5
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1answer
113k views

Do signal booster apps work? How?

I do not have the best signal on my Galaxy S4. I have had a recommendation on downloading a Signal Booster App. How do they work (or do they work at all)? Are there ways to boost my signal strength ...
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0answers
1k views

My Sony Xperia E keeps losing coverage

Both a Sony Xperia E today and its randomly losing coverage out of nowhere? I always have coverage with every other phone but this phone I keep losing signal! Is this a software issue or can it be ...
5
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2answers
5k views

How can I automatically connect my phone to the stronger Wifi signal around it?

I have a Google Nexus 4 and have two wi-fi networks that I use in my home. Since they are in some range of one another my phone stays connected to the router that's farther away from the one I'm ...
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0answers
4k views

After rooting my verizon Galaxy S3, I have no data or cellular connection?

So, when I first rooted my phone, everything worked fine. I had used CM 10.1 (Or at least some version of Cyanogenmod). Being curious, I wanted to try other ROMs. I then installed MUIU v5. Didn't like ...
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1answer
64k views

My Samsung Galaxy S2 keeps saying not registered on network when I try to phone

My Samsung Galaxy S2 keeps saying not registered on network when I try to phone also a no entry sign where the signal bars should be keeps randomly appearing. Does anyone know how to fix it or whats ...
24
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5answers
21k views

How to make android prefer mobile data when wifi signal is very weak

When I leave home or the office there is a ring around it where I simply have no connection at all. This is because the WLAN network from my router at home or the one at the office is detected, but ...