Phone shut down and restarts

[dandedoes]

Why zo my z3 suddenly shut down and then restarts? I have experienced it several times at about 4-5 o'clock in the night. very disturbing!

[Uliwooly]

Do you have a regular NANO SIM card or did you trimmed a regular SIM card?

[Phy]

It's probably a Third-party app, you could boot on safe mode for few hours or just repair your phone with PC Companion

[Phy]

How to boot on safe mode

http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008

Sony PC Companion 

http://support.sonymobile.com/gb/tools/pc-companion/

[Jake-SonyXperia · Accepted solution]

Hi dandedoes, 

Welcome to the community! Since you're new please be sure that you have checked out our Discussion guidelines.

There are a number of factors that can cause restarting, in many cases a SIM card or an SD card can be the culprit. I do suggest removing the SIM but also any SD card and try testing to see if the issue continues.

This can also be related to third party applications or apps that may have corrupt data. In such a case removing any new apps would help resolve such an issue.

Finally if none of the above works, then a software repair would be the best option to perform. See the instructions below on how this is done.

1. Before you start you have to download the PC Companion software from PC Companion
   and install it on your PC.
   2. Once installed on your PC, double-click the PC Companion icon on your desktop to start the update.
   Note! For some models you will be prompted to do a backup prior to the update and then restore.
   3. Install and open PC Companion then select Support Zone.
   4. Phone Software Update.
   5. Start.
   6. Repair Phone
   7. Continue
   8. Accept data removal
   9. Next
   10. Wait for prepare
   11. Select Phone
   12. Follow the connection steps

[Uliwooly]

@dandedoes If you use PCC, don't forget to backup

PC Companion (PCC)

Bridge (for Mac)

Alternatives on How to backup Xperias

http://talk.sonymobile.com/thread/36355

[dandedoes]

Regular

[dandedoes]

I have a regular sim card.
The crashes has increased and now my apps suddenly stops. Guess I have to do the hard way and reboot like I have done once before. This didn't happen when I had a iPhone. Android was a bad choice...

[Sam]

We are sorry to hear you feel this way, however I would advise following Jake's advice.

[Curnow1]

@uli is there even a possibility to enter microsim or normall sim to this device?