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problems with modified device
So my friend took my phone to be "unlocked" so that I could use it with my new provider. Its a galaxy s3 and it came back a lot more sluggish and annoying to use. My main issue with it is that I dont get OS updates for it, some options (such as proximity sensor and call settings) are completely missing, theres my new provider logo splattered everwhere and a full battery doesnt even last one hour, not to mention its not usable while charging.
Can i recover factory settings? And if so will it be locked to a single network again?