messaging

[Jomy]

While sending a message, my XPERIA z prompted me some question,. Without reading it I selected an option and selected use always.. Now I'm not able to send message to that number only..

[Uliwooly]

backup your sms/mms and then 

settings > apps > all > messaging > clear everything > restart your phone and check again 

Alternatives on How to backup Xperias

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