But on edge you will get speeds, isnt it!
Base GPRS is known as 2G.
EDGE is known as 2.5G.
Then comes 3G with 384kbps.( The earliest 3G phones , I had one of them N6630)
Then came HSPA devices known as 3.5G , with speeds in multiples of 3.6mbps and so.
Most new Generation devices are capable of Edge/HSPA. But I think the average speed you can get on Edge will be somewhere around 25-30kBps at it's peak. That comes to be around 200kb(bits)ps+.
On my Vodafone EDGE network I am receiving an average DL speed of 16-22KB(bytes)ps.