1. Why do you need 3g when you have data from wifi?
2. Delivery reports can be turned on in Messaging settings, no bugs he.
3. Try to leave jpegs only in the folder. Or maybe you have a bad file there or it simply chokes at that number of files.
OT MaxDB, CD1, CD5, J5, GD96, ME45, T68i, X6, CX65, A925, E398, MPx200, X6-2, OT715, D600E, W810, M600i, BB8100, W880, N95-2, P1i, Ignito, W880, X1, MS1, MS2, TP851, XT910, GTab 10.1, SGS3, SGS4, SGNote 10.1, Nexus 7 II