Forum Discussion
after change device is not working the mobile network.
I upgraded my phone and changed the SIM card to a new device.
Since then, mobile data is not working.
I tried the Update Sim Card on the Tmobile site, but the Tmobile site does not work properly.
How can I activate my Sim Card?
Are you doing on the mobile site or from a desktop.
I found any changes need to be done works better on a desktop.
