[Bucephalus355]

Maximum amount of digits I’ve ever seen for a cellular VM system is 11 (among the big public companies). I believe Sprint can handle up to 7, and Verizon allows up to 10. Of course these are digits with no more than 10 combinations for each slot instead of the 70+ alphanumeric offers.

[LinuxBender]

I'm logged into Verizon Wireless and it won't let me go beyond 4 digits.