Like any other phone, Samsung's Galaxy S4 came with its own set of issues. Most of the issues are minor and can be fixed by the phone's owner easily. Below is a guide to some of the Galaxy S4's most common issues and the fixes that people can try.
Phone Reboots on Its Own
Many users report that the S4 randomly reboots on its own. No sure cause has been pinpointed, but the software and the SD card are believed to be related to this phenomenon. According to Fixed by Vonnie, users can upgrade to the latest OS firmware to avoid reboots from happening. If this does not work, remove the SD card and observe the behavior of the S4. If the reboots still happen, it may be a hardware problem that requires the owner to take the phone to the shop for repairs.
SIM Card Not Detected
This is considered a major issue because it may turn out to be a hardware issue, but users can try this quick fix to see if their S4 unit needs to be repaired. Check the SIM card tray, The International Business Times suggests. Take the SIM card out and lightly dust off the chip on the card. Put it back in, and then turn on the phone. If it still says "No Service / SIM card not detected," try it with a new card. The S4 unit is defective and needs repair / replacement if the new SIM card does not work.
Apps Deleted After Update
The KitKat 4.4.2 update seemed to bring with it a few issues and glitches. One of these problems is the loss of several installed apps after updating the S4, according to Gotta Be Mobile. A tip from Gotta Be Mobile suggests re-dowloading the apps - the application data will still be available, but the user will need to log into the app again to retrieve their data and start using the app itself.
Contact List Broken
S4 users noticed that after updating to Android KitKat 4.4.2, their contact lists became broken according to WCCF Tech. This is an update glitch that may have something to do with synced email contacts. The fix is simple: delete the synced email account and sync it again. The contact list should be intact afterwards. Avoiding this is easy, of course - create a back-up of the contact list and save it to the phone's external memory for importation after the Android update.
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