3G telephony protocols
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There are two, the most popular, UMTS mobile telephony protocols - HSDPA and HSUPA. The most common, installed in many newest devices, is High-Speed Downlink Packet Access (HSDPA).
Theoretical down-link speed provided by HSDPA is up to 14.4 Mbit/s, but existing solutions are able to handle with 7.2 Mbit/s in down-link and 384 kbit/s up-link. High Speed Uplink Packet Access (HSUPA) provides improved up-link - theoretically up to 5.76 Mbit/s.
In many 3G mobiles there is installed protocol 2.5G telephony - EDGE which is able to send data with 236.8 kbit/s.
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