Happend to my cousins S3 too, But if you are using Netgear, Add your IMEI and choose a name for your phone, Then ypu will be able to use wifi.Try using wifi at a 24 hour McDonald l, KFC and Starbucks coffee. If wifi doesnt work, Get unlimited data.You can pay 12 $ or idk every month to have 4G data access without wifi.You can go on Facebook anywhere, Car if you use 4G data
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