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    I cannot input or save any APN details and my mobile data does not work. Please help!

    Hello, I have bought an unlocked samsung galaxy s5. It seems it is a phone from the USA, previously on Sprint network. I am using a Brazilian local carrier's sim card which is realtively new (4 months old). The phone is a G900P.04 running android 6.0 Marshmallow. The mobile data is not working...