unlocked tablet now locked after repair

[eddie Sim]

hi i am tried putting a three sim card in my samsung tablet, but its asking for a pin code to unlock. it never did this before i used many diffrent network sim cards in my device even a three sim card. the only sim card that work in my devie is the ee sim card.

i had the device in for repair last week at a samsung repair shop, would the device go back to the network it was originally on before it got unlocked.

 

[H3aTeRzz]

I would think that it would depend on what type of repair was made? Was the motherboard replaced? They perhaps Flash the original software.