according the AT command guide, four mode for data transfer:
3 both, transparent preferred
4 both, non-transparent preferred
can we change it from default Mode 1 to Mode 3 or 4
At the moment Nokia 30 supports non-transparent mode for data transfer.
M2M Developer Support Team
For those who didn't understand the question,
"Non-transparent" in the context of "GSM data" means error correction in the radio interface, and "transparent" means no error correction. See http://www.cellular.co.za/gsm_data_transparent-data.htm for details.
Nokia M2M Platform trainer