z1 software problems

[daus]

Hello xperia care,I Firdaus, the Xperia Z1 user form Malaysia. I already update my z1 using new firmware (14.4.A.0.108) and its already update only 15 minutes. I hopefully all my old problems are fix and solved, but its doesn't change anything. My problems is my z1 cannot connect my wifi. its always show  "avoid poor internet connection" but when i check my wifi properties, its shown excellent connection up's to 54mbps. My second problem is my z1 cannot change the lockscreen wallpaper. I try in all ways like change from setting, from album, and also homescreen. It's always show default lockscreen wallpaper (Air). FYI, this problem also hit my theme whenever i change my theme, the theme lockscreen wallpaper doesn't change and always show deafault theme wallpaper (Air). I already waiting this update after it's hit China country and i believe this firmware update will be in soon on Malaysia. but when the update are available, its doesn't change anything. Hopefully your team can respond on my complaints and fix it for my Z1. Thanks.

[Kulveer_Singh]

For Lock screen wallpaper try this open setting>Apps>All and then select Lock Screen from list, then clear cache and data.
For wifi message please check setting>wifi>Advanced then 'Avoid poor connection' option must off.

If not solve, then u can repair your firmware with latest firmware by using PC Companion.

[daus]

i already update my z1 and finally my lockscreen wallpaper now can change, but i lost all apps and data in internal storage. But my wifi connection problem it doesn't change anything. It's still weak and i cannot rach my wifi. This problem also hit another Z1?. This is a major problem for this update?