CSD is not supported for transferring data from S60 3rd Edition FP1 (Known Issue)
CSD is no longer supported for transferring data in S60 3rd Edition, FP1 and later devices.
CSD, short for Circuit Switched Data, is the mode of transferring data over a circuit-switched connection. This data bearer is no longer supported for S60 3rd Edition, FP1 and later devices.
For more information on CSD: CSD and HSCSD
This data bearer has been overtaken by newer data bearers like EGPRS, GPRS, HSDPA, HSUPA, and WCDMA.