How to Use With Foreign SIM Card?

    My goal is to use the DIGITS app with a foreign SIM card while travelling abroad - and to set the DIGITS app to use data only (yes, I know about T-mobile free roaming, but I have a German SIM with a prepaid balance, which I might as well use for the faster speeds.)


    The problem is when I put in the German SIM, the DIGITS app initialization does not recognize the phone number on the German SIM, and then asks me to input the phone number directly.  But, the app will not accept the number of the German SIM.


    Any suggestions as to how I can use the app with the phone with the foreign SIM?

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