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hello all
i just updated my sony xperia sl to the latest version ( 6.1.A.2.55 ). but the thing is, after the update, the mobile network is not working properly. i am currently unable to access the internet via mobile network. it was ok before the update. please help me 
Try downloading the settings once again
Go to settings > Xperia > Internet settings > Accept
Let me know how it goes
i tried that :smileysad:, i had this problem few times before, each time after the system update, there almost always be a problem with data traffic afterwards.besides that, i tend to disable data traffic to save my battery when i am not using internet, but when i enabled data traffic later, it just wont connect to the internet. usually by restarting the phone will do the job. but i tried that many times and it all comes to no avail. is there any explanation to this 
Do one thing, reinstall the phone's software on your phone
SUS ( Sony Update Service) ... download and install it on pc and follow the on-screen instructions
http://www.sonymobile.com/global-en/tools/update-service/
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