Common troubleshooting. You can use this tag when you cannot find a better fitting one. Please read the tag wiki for some first-aid.

learn more… | top users | synonyms

20
votes
6answers
230k views

Unable to connect Galaxy S3 to PC via USB

I've had my Galaxy S3 for a few months now, and have always been able to connect to my PC via USB. A few days ago, it suddenly stopped working. I've found many other Android.SE threads, but none have ...
14
votes
1answer
5k views

App <X> isn't working correctly. How can I fix it?

I have an application that isn't working correctly. Either it's not launching, or not responding to commands, or some of the functionality isn't doing what I expect. What are some simple steps I can ...
10
votes
1answer
6k views

How do I make Android consider my WiFi Access Point as valid (blue?)

We have a very large wifi network at Stack Exchange, and the primary guest network is tightly locked down. Our firewall rules permit essentially just http/https and vpn connections. When our ...
7
votes
2answers
560 views

Recover Android system with TWRP Recovery

Note that I am running Mac OS X. I tried installing an unofficial version of Cyanogenmod I found on XDA Developers that supports kltemini (SM-G800F). However, I messed up somewhere in the ...
7
votes
1answer
945 views

What should I do before I try advanced troubleshooting

Are there any generic troubleshooting steps and tips to be followed before I search for problem specific troubleshooting options? Then what are they? I only have a general knowledge on Android and ...
7
votes
7answers
23k views

WiFi Error: “Failed to connect to network”

Intermittently, when I try to connect to a WiFi network, I get the following error message as a toast message: Failed to connect to network The message pops up immediately upon attempting to ...
4
votes
1answer
123 views

Battery level always 42%

I purchased a second hand nexus 5 to find out that the battery indicator is always showing 42% and never updates, regardless of the actual battery charge level. I tried replacing the battery with ...
4
votes
0answers
920 views

Music playback stops randomly

I have bought the Xperia ZQ (Xperia ZL's alias in Brazil) C6503. I am experiencing a very annoying problem: from time to time the audio playback in any audio app just stops. If I hit play again it ...
3
votes
0answers
578 views

How to Diagnose WiFi Issues?

My Samsung Galaxy S4 (GT-I9515) with Android 5.0.1 does not connect to one particular WiFi any more - the Eduroam network at my workplace. The network is listed in the available networks list, with ...
3
votes
0answers
174 views

Double message notifications after upgrading Talk to Hangouts (CyanogenMod 7.2) [duplicate]

Phone: HTC Wildfire OS: CyanogenMod-7.2.0-buzz I recently upgraded Talk to Hangouts, and now each incoming message results in two notifications: one styled like the old Talk, and one from Hangouts. ...
3
votes
1answer
11k views

How to access Samsung Galaxy S2 storage while phone is off

My Galaxy S2 recently froze while browsing facebook using Firefox (the loading animation kept playing though), then shut down after a minute. I haven't been able to turn it back on since then. I tried ...
2
votes
1answer
14k views

On Android, what is a “blue screen”, and what should you do about it?

Some Android users complain about seeing a "blue screen", and that their device has become unresponsive. (Here is one example, including a photograph of the affected device. Here is another example.) ...
2
votes
2answers
495 views

What is trying to connect to the network?

When I'm not actively using the network, I usually turn off Wifi, Bluetooth, and Data. Since upgrading from Android 4.3 (stock) to 4.4 (OTA update from my carrier) I notice two things: Battery life ...
2
votes
1answer
39 views

Internal space near full but shouldn't be and not according to other stats

So yesterday i was seeing how many apps i have installed and i noticed this...according to which only 248 MB is free. Which looks wrong to me too. But that is not the case according to storage ...
2
votes
1answer
997 views

How to pair a symbol CS3070 bluetooth scanner with a nexus 7 (2013) tablet

The pairing code asks me to type on the device which has no keys. Is there a work around?
2
votes
2answers
1k views

How to troubleshoot overheating and high battery drain in an Android Device?

Device info: Model : Micromax Canvas Nitro A310 Android Version : 4.4.2 Kernel Version : 3.4.67 Device Status : Rooted, Philz touch recovery, Xposed Framework installed Issue: My(relative's) ...
2
votes
1answer
313 views

Babbel languages learning apps won't play sounds

The Babbel language learning app doesn't play sounds anymore; this used to work for me for a while but now doesn't. Sounds are the central feature of the app which makes it superior to the PC web ...
2
votes
1answer
2k views

How can I determine what is causing my Nexus 4 to freeze?

I have a new-ish Nexus 4 with Cataclysm ROM installed (rooted, 4.3). The device has recently started freezing - being unresponsive to button presses, but with the white LED pulsing. I have to ...
2
votes
3answers
3k views

“Settings” hangs when scanning for WiFi since JB update on One X

I have an HTC One X which has never before exhibited any connection problems. Since the update to Jelly Bean around 2 weeks ago, it cannot reconnect to a WiFi network once it has lost the ...
2
votes
1answer
2k views

How to troubleshoot a lockup/freeze

I have a GNex running on CN(A) 3.8. It has started to lockup/freeze when the screen is off. So far it occurs mostly overnight while it's charging. I have to pull the battery to resolve. I believe it ...
2
votes
1answer
215 views

Rooted Galaxy Nexus GSM silently fails to reflash/erase - Unable to wipe and its rebooting continiously

I have been struggling for a week. Searching all though the internet. My Galaxy Nexus has suddenly stopped working. It is continuously rebooting. Its rooted but has stock rom 4.3. My problem is, I ...
1
vote
1answer
6k views

4.4 Update (Sprint Galaxy S3) disabled pattern lock, can i reenable?

This morning I applied the 4.4 update on my Galaxy S3 (Sprint). I noticed that I can no longer use a pattern lock. The message: "Turned off by administrator, encryption policy or credential storage" ...
1
vote
2answers
877 views

Two errors that refuse to be resolved, Google Play, Android 2.2.1

I have an old phone (LG Optimus V) running Android 2.2.1. I recently took it out and would like to download some apps on it. It automatically updated Android Market to Google Play by itself, but for ...
1
vote
1answer
197 views

Looping through Terms and Verify Google Account after hard reset

I have a recent Samsung Galaxy 6S Edge phone that had to be factory reset. After the factory reset it will loop through the 'Terms and Conditions' acceptance screen and the 'Verify Google Account' ...
1
vote
1answer
2k views

Do I need to root my phone to get a tcpdump?

I'm troubleshooting my aCal installation and the good folks at aCal asked me for the output from tcpdump -A -- do I need to root my phone and install busybox or can I do this from a terminal emulator? ...
1
vote
0answers
13 views

“The certificate was not installed” error when installing a CA root certificate

I am developing an Android mobile application and want to test that the application behaves as expected. I am using the OWASP ZAP intercepting proxy for this purpose. The application communicates to ...
1
vote
0answers
44 views

Whatsapp only lets me delete the profile picture [Solved]

Recently, I wanted to change my profile picture on whatsapp for another one, but when I tried to do that, only the option to delete it appeared. This also happens when I want to change the background ...
1
vote
0answers
117 views

Galaxy S5 G900V startup failure with inconsistent symptoms making troubleshooting difficult

o/ My Samsung Galaxy S5 suddenly and quickly started deteriorating a few days ago. I did also install a software update from Verizon about a week ago, but what's odd is how the symptoms worsened ...
1
vote
0answers
476 views

how to change the permission and ownership for internal sdcard

I have a problem with my internal SD card on my android 4.2.2. It shows there are no files on the internal SD card but there is a shortcut called "legacy" and I can't write anything on the internal SD ...
1
vote
0answers
246 views

How can I troubleshoot what is causing 'Android OS' to eat up lots of battery?

Are there steps I can take to rule things out eventually leading to a root cause? I am currently using the latest Dirty Unicorn ROM on a Nexus 5. For the same of argument, consider the case where ...
1
vote
0answers
369 views

MMS messages text disappears

When I receive an MMS message (Android 4.1.2), I can see by the momentary preview that there is text to the message, but when I open it, I cannot find the text, only the image. Anybody have the ...
1
vote
0answers
35 views

What does leaving your device off for a while do?

This page: What should I do before I try advanced troubleshooting says 3) Keep your device switched off for a while. Make sure you remove your SIM card (and the battery and SD card as well, if they ...
1
vote
3answers
8k views

What exactly is Device Memory and is it possible to see it's contents?

I'm using Sony Xperia L (Non-Rooted, Stock OS) which shows me I have 1.52 GBs of Device Memory. "Apps and Media" are taking up 0.98 GB and ~240MB is remaining free. I don't understand where all that ...
1
vote
0answers
885 views

Why: My phone will not install downloded apps. Will not calculate Storge usage % (Audio, Apps, etc.)?

My phone wouldn't install an app the other day (jefitt) so I tried looking at the internal memory (% usage for Audio, etc.) and it wouldn't calculate it (just showed the calculating status for 4 or 5 ...
1
vote
0answers
494 views

Galaxy S2 turns off randomly

I got a problem with my Samsung Galaxy S2 I9100. I have it for round about 8 monthts now and experimented with some custom roms. I installed cynogenmod 9, 10, 10.1 tested Syah Kernel and installed ...
1
vote
1answer
70 views

Phone added contact unfindable

My phone's contacts are synced with my Google and Facebook accounts. Whenever I add a contact through my phone it gets synced to my Google Account. Wonderful... Ok I usually send them a text message ...
1
vote
1answer
4k views

Asus Zenfone 6 doesn't see SIM cards, keeps booting itself. How to troubleshoot the issue?

I have a problem with Asus Zenfone 6 device, which worked well on stock firmware with minimal amount of additional installs for about a year. This is a dual SIM phone and it has both SIM card slots ...
0
votes
2answers
3k views

Htc one m7 International not recognized in adb mode

I have an htc one m7 running bootloader hboot 1.56. I unlocked the bootloader via htcdev.com The bootloader now shows Unlocked My phone is recognized in adb when the phone is turned on. But when i go ...
0
votes
3answers
2k views

How to get why an app crashed?

I regularly obtain the infamously unhelpful "unfortunately crappyApp has stopped working". How to figure out what actually went wrong? I guess there's a stack trace somewhere, though ideally I'd like ...
0
votes
1answer
4k views

I can't answer phone calls in some situations

I have a Motorola Citrus running android. I know this is a lame question, but I am a newbie to android and smart phones. Sometimes I will get a phone call I can't answer. The incoming call screen ...
0
votes
1answer
155 views

Wi-fi stopped working

The other day out of the blue my Wi-Fi stopped working. I've tried fixes I found here in stack exchange (see below), but nothing seems to work. How can I tell if it's a hardware problem or a software ...
0
votes
0answers
42 views

Unfortunately settings has stopped

I have a lg Optimus Exceed 2 (VS450PP). I have been using it for experimentation and had to do a factory reset. When booted back into Android, I received a settings f/c. I have tried to enter the ...
0
votes
0answers
28 views

Twitter app corruption (Play Store error -504)

I was browsing on twitter yesterday when my battery died. After charging my phone It crashed whenver it tried to launch. I tried to clear all the cache data and it still crashed, so I tried to ...
0
votes
1answer
24 views

Lenovo A6000 isn't turning on

I slept at around 3 am and woke up around 1 pm, and then when I checked my Lenovo A6000 it was not working. It showed me a blank screen. I pressed the power off multiple times and it keeps blinking ...
0
votes
1answer
40 views

How to get rid of these marks?

I'm 100 percent sure that it's possible because I managed to do it a few months ago, but now I do not know (don't remember) how to do it again. It looks like someone can help here. Thanks in ...
0
votes
0answers
48 views

How to debug Android crashing?

My Android Samsung Galaxy Alpha keeps crashing with no obvious pattern. Also, it's not a common crash where the screen just goes dark, and the system reboots.. it actually goes into a shutdown ...
0
votes
0answers
19 views

hardware or software

In the last month my S6 restarts or freezes randomly. I tried clearing the system cache through recovery and also some apps cache. removed all unnecessary apps and reset configuration to the very ...
0
votes
0answers
48 views

Problems rooting lg risio/leon from laptop [closed]

I have H343 LG Risio/Leon that I was manually rooting with PC but I get stuck in CMD at UNLK : after typing code and pressing enter. At which point I get this message: ...
0
votes
0answers
65 views

Nexus 5 has awful Wi-Fi

Ever since I bought the phone a few days ago (I believe it's manufacturer refurbished), it has not been getting any decent speeds. I've already tried factory resetting it many times and fiddling ...
0
votes
0answers
61 views

Samsung Galaxy S2 phone keeps periodically detecting that charger is plugged in even when it's not

Samsung Galaxy S-2 phone keeps periodically detecting that the charger has been plugged in, apparently randomly I have noticed, however, that if I keep using the UI of the phone it doesn't happen, ...