Share your experience!
Strange! Try to clear data for lockscreen under settings > apps > all > lockscreen. Clear data. Restart your phone by press and hold the power button and the volume down until the phone vibrates.
If the problem persists you can try to clear data for Xperia Home. Note that the homescreen will be reset when you do this.
In this case please try running an update/repair:
1. Download the PC Companion software from http://www.sonymobile.com/gb/tools/pc-companion/
and install it on your PC.
2. Install and open PC Companion then select Support Zone.
3. Phone Software Update.
4. Start.
5. Repair Phone
6. Continue
7. Accept data removal
8. Next
9. Wait for prepare
10. Select Phone
11. Follow the connection steps
What are your thoughts about this forum? Let us know by doing this short survey.