A quick google found this:
[Barry-devel] Making tethered modem support easy
Yes, I am using Sprint. I used your original rogers script and just changed the connect and pty lines. connect "chat -v 'ABORT' 'ERROR' '' 'AT&F' 'OK' 'ATZ' 'OK' 'ATI' 'OK' 'ATDT#777' 'CONNECT'" pty "/usr/local/sbin/pppob -sP passwd"