Settings to receive Handcent MMS messages.
I have found all the correct settings for Android to send and receive MMS.
On the Android settings itself:
Note: It doesn't matter if Wifi is on or off...the next steps will work,
On the Stock Messaging App:
1. Select Delete old messages
2. Unselect everything elses
On the Handcent App:
1. Go to settings, then Application Settings - Default Messaging App-Select Disable
2. In the Send Message settings - Select Auto Convert to MMS and Auto Resize and Auto Convert
3. Go to Receive Message settings - Uncheck auto receive, roaming auto retrieve and most important, UNCHECK Advance Download, check Auto Download,
It took me some trials and error but these enabled me to be able to send and receive MMS messages.