Just bought a iPhone 4s on ee having trouble activating sim?

Tmobile site is asking for 14 digit sim serial and my card pack only has 12 digit serial.
no 14 digits anywhere on the pack, even the digits written on the sim are only 12.
please help

Added (1). can't even call 150 to make a top up, full reception and 3g showing.

I would take into a tmobile store and have them set you up.

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