Almost certainly not a phone number. I think 3G/4G use IMSI[1] as the customer identifier. You only get a phone number if you're going to be doing voice calls o

Almost certainly not a phone number. I think 3G/4G use IMSI[1] as the customer identifier. You only get a phone number if you're going to be doing voice calls over the carrier's network. [1] https://en.wikipedia.org/wiki/International_mobile_subscriber_identity https://en.wikipedia.org/wiki/International_mobile_subscribe...