Off-topic, If your area doesn't have 3G, most likely will be covered by EDGE.
For Maxis, I think you need to get the Maxis APN, the DiGi Internet software is not locked, you can just create a new profile. Dial *99#
I tested with U Mobile with the DiGi Internet software.
Maxis Digi modem - how to set up for maxis broadband use