Can I go back to my My Choice SIM card while waiting for 5.0 to activate?

If activation to 5.0 SIM fails can I put the 4.0 SIM back in and use that until 5.0 activation problems are solved?

@mistermike,

It would depend on where in the process the failure occurs. If it happens after the phone number transfer process is complete with our former number assignment partner, then your 4.0 SIM card will no longer work.