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Has anyone else had the issue where the Xperia Z lags when texting or deleting texts? The first day I had the phone it was fine but now it lags like crazy and it's only 3 days old.
update your phone or try this
settings > apps > all > messaging > clear everything > restart your phone
if you want to update or repair your phone
Update Service (SUS)
http://www.sonymobile.com/gb/tools/update-service/
http://www-support-downloads.sonymobile.com/Software%20Downloads/Update_Service_Setup-2.11.12.5.exe
Bridge (for Mac)
Alternatives on How to backup Xperias
http://talk.sonymobile.com/thread/36355
Don't forget to mark the Correct Answers & Helpful Answers
Its lagging for mee too, but the only thing you need is a "Battery doctor". You can download it from Play store. The ram is full with apps and tasks even if you close everything.. Thisone kills the autostarted apps, games and cleans junk.
From the other hand, mine builds a lot of heat up during gaming( it burns my finger :smileygrin:)... and sometimes reboots as well..
its not a good idea to use taskillers, task managers, antivirus, battery apps etc.