Upgraded my phone. New phone comes with sim card. Set up instructions on tmobile site say to put old sim in the new phone. Should I use the old sim or have tmobile activate the new sim card?
Best answer by syaoran
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Userlevel 7
+15
I would use the old SIM unless it doesn't fit in the new device. Keep the new SIM to use if the old SIM ever needs to be replaced.
Userlevel 7
+14
If the old sim is the same size use the old sim.
A
Use the old SIM, save the new one to use as a spare. This is particularly handy if you travel overseas, because if your phone is lost or stolen, T-Mobile won't ship you a replacement SIM overseas.
Could both be active with the same number?
A
T-Mobile (US) does not provide for having two SIMs with the same number. At one time T-Mobile (DE) sold this service under the brand "Zwilling" (Twin).
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