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4.4.2 update for xperia Z1 the worst update. Since I've updated my phone a lot of things started to go wrong. The speakers, always more than 80% of ram in use, battery drain, bad data signal, etc. I really hope that sony is listening to all the complaints and is planning to do something about it asap. Otherwise is going to lose a lot of actual customers and potential ones.
Hi there,
Try to repair/re-install your current software with Sony Update Service and check if everything is back to normal afterwards.
NOTE: Backup your data first http://talk.sonymobile.com/t5/FAQ/Backup-amp-Transfer/m-p/407253#U407253
Cheers.
never update your phone when sony releases its first update...check all past updates when sony brought 4.3 first it was full various bugs then after a month they again brought a bugs fixed update..tthis first 4.4.2 kitkat update is full of disgusting bugs so i am waiting for a bugs fixed update of kitkat 