[mbellot]

OK, receive works but sending hangs indefinitely.

FWIW - I also tried changing

ro.cdma.home.operator.numeric=31000

to

ro.cdma.home.operator.numeric=310120

because I found 310/120 in several places as Sprint network settings.

After I did that I had three APNs auto populated in the list: 0, 1 and uscc

These three appear in apns-conf.xml, so I'm assuming android is auto-populating the APN list when it gets an MCC/MNC match.

It probably doesn't help that I'm on Boost instead of Sprint, but MMS did work in both WinMo and FRX...

Too late to think, going to bed.