Closed Samsung galaxy s5 (at&t)

[jared010493]

help please
i have samsung s5 phone with exclusive at&t sim in the past
now globe sim is ok to the phone, i use globe sim in the present
PROBLEM:
i cannot use SHARE IT APP and my HOTSPOT
it only says SIM CARD IS INVALID when i open share it and mobile hostspot
i cannot even upgrade it to lollipop version....

plsss let me know what is the problem of this phone
thank you
more power

 

[Fuxionz]

You must go to tech store, or repair shop of android and they will offer you a unlock network for all carriers.

 

[jared010493]

You must go to tech store, or repair shop of android and they will offer you a unlock network for all carriers.

Sir, it is already active to all network. The problem now is THE HOTSPOT not working because it keeps telling that the SIM CARD is invalid...