Reliance Netconnect from RCOM officially have GSM based 3G Dongles and High Speed CDMA based Dongles/Datacards. Speed and reliability of the GSM or CDMA depends on the network quality and Signal Stregth in your area. Speed can vary from 512Kbps to more than 3mbps depends on the above parameters.
In general Huawei and ZTE are the main manufactures of HSPDA based highspeed dongles in GSM or CDMA.
They offer GSM based dongles. There are 5 variants available.
a. ZTE MF190
b. ZTE MF668
c. Micromax MMX-350G
d. Micromax MMX-310G
e. Huawei E173
ZTE MF190 3G USB dongle
This dongle works in the UMTS 2100 Mhz network and supports HSDPA upto 7.2 Mbps and HSUPA upto 2 Mbps. It can store up to 32GB of data in a microSD card that can be inserted into the dongle. It costs Rs. 2500.00 approx.
ZTE MF668 3G USB dongle
This works on the HSPA+ UMTS 2100 network. It supports speeds upto 21.6 Mbps and can store 32 GB data. It costs Rs. 4500.00
Micromax MMX 350G 3G USB dongle
Works on the UMTS 2100 Mhz network. Can support speeds up to 3.6 Mbps and can store upto 16GB of data in a microSD card. It costs Rs. 2300.00 approx
Micromax MMX 310 G USB dongle
Works on 2100Mhz network . Caan support speeds upto 3.6 Mbps. There is no microSD slot so this stick can not store data. It costs about Rs. 2000.00 approx.
Huawei E173 3G USB dongle
Works on the UMTS 2100 Mhz network and supports HSDPA 7.2 mbps and HSUPA 5.6 Mbps speeds. Can store 32 GB of data in microSD card. Costs about Rs. 2500.00 approx