Maybe this will help...

For working EVDO, WAP, MMS (in + out), Custom Boot logo:

1) Place phone in USB Modem Mode
(START > SETTINGS > SYSTEM > DATA CONNECTION > As the modem through USB)
2) Load PRL
3) NAM Program phone **772 (Use touch pad (black square) to confirm each entry)
4) Edit DATA and MMS with SamsungPST using i910 DLL.
5) Load WAP setup (proxy) with rapiconfig.exe (just like Moto Q)
6) Create an MMS profile, set it as default:
Name: CricketMMS
MMSC: http://mms.mycricket.com/servlets/mms
Data: Cricket-WAP (select Cricket Connection)
Gateway: None
7) Overwrite custom boot screen and sounds in the \WINDOWS folder
“Ani_Poweron.gif” and “Ani_Poweroff.gif” Dimensions: 240×400
“pwr_on.wav” and “pwr_off.wav” for sounds