1. The contact application is blocked
This is one of the most common problems with the new update. If the message “contacts have stopped working” arrives, it is best to eliminate the application’s cache memory. To do this, just go to Config. > More> Application manager> All. There you find Contacts and click on it. A window will appear with application information, where the option will be Clear Cache. If the problem still persists, try to delete the application data.
Obviously, this solution is for any application block.
2. The service com.android.phone stop working
If an error message appears saying that the com.android.phone stopped, you can solve the problem through Config. > More> Application Manager. Then just click on the menu button (below left) and select Reset app preferences.
It is also advisable to enter Safe Mode to find out if the error is also repeated. It contains only the applications that come standard with the device. That way, we can find out if the problem is with the system or comes from a third-party app. If the error message does not appear in Safe Mode, then we should check the applications that we have recently installed. It is best to uninstall them one by one to see if the problem persists.
Of course, if the problem affects many users, Samsung will launch a patch to solve it.
3. Loss of battery
Another of the most common problems after performing the update. Usually the excessive loss of battery usually happens during the first days after the update, and then the device returns to normal. If that is not your case, you can try several solutions, such as turning off the Galaxy S4 and turning it back on after 5 minutes.
You can also go to Config. > Application manager and then check which applications are consuming RAM, and in Config. > Battery, to see which ones are overcharging the battery. That way, we will know if the problem is with the system or any application.
If that doesn’t help, restart the device in Recovery Mode (with S4 turned off, click on the volume up button + Home + power button) and delete the cache partition using the wipe cache partition option. If the problem persists, you will need to take drastic measures. Yes, we are talking about data restoration, but not without first backing up your data!
It is possible to perform a factory reset from Recovery Mode or from the menu Config. > Accounts> Backup and restore.
4. Delay and slow application launch
It is also quite common for the device not to function smoothly after an update. We can try to turn it off and remove the battery for 30 seconds. Sometimes that is enough to make the problem go away. However, if delays persist, it is best to make a wipe of the cache partition. Once again, go to Recovery Mode (turn off the S4 and turn it on by clicking on the volume up button + Home + power button). Once inside the menu, simply select wipe cache partition.
Other tricks to avoid the lags and making the Galaxy S4 improve its performance are, for example, disabling window animation, transition and animation duration, from the Developer Options. To activate them, go to Config. > About the device and click the build number several times.
It is also advisable to disable direct access to S Voice from the start button. It usually causes a delay, as the system always waits a moment to see if we want to open S Voice. To disable this option, open S Voice and click the menu button. There you will find the option Open with the start screen.
5. The keyboard disappears
Many users commented that one of the problems with the update is the disappearance of the keyboard while writing a message. A possible solution can be found at Config. > More> Application Manager> Running. Locate the Samsung keyboard there to check if there is an error message. If so, you can download an alternative keyboard app. We recommend SwiftKey.
6. Wi-Fi connection issues
Another common problem after an update. To solve this error we have a series of simple processes: turn the wifi connection off and on several times, enter Airplane Mode for a moment, forget about the connections (and add them again), restart the router, disable Smart Network, etc.
7. Bluetooth problems
Also quite common and with no precise solution so far. It is best to turn Bluetooth off and on again. Sometimes solutions are found in the simplest action. If that doesn’t work, you can also disable and re-enable pairing with your Bluetooth devices.
8. Overheating problems
Some Galaxy S4, according to users, experience problems with overheating after the update. The newsroom device running with Lollipop did not present this problem. If this is the case for your S4, simply remove the battery and microSD card and insert them again. At the moment, this is the only solution for an eventual overheating, and can be a nuisance for those who use external memory a lot.
Did your Galaxy S4 running on Lollipop have any of these problems? Tell us your impressions in the comments below!