The A1200 comes in 4 models:
A1200 - this was the first model. It was released in 2006. Many of the generic firmwares that come with the A1200 have issues with low speaker volume that makes it hard to listen to voice calls and media from within the handset.
A1200I - shortly after the release of the A1200 in east Asia, the A200I was released in Latin America. It came with an Internation version of firmware that included Spanish, Portuguese and French language support.
A1200R - in response to the volume issue with the A1200, Motorola released the A1200R (Refresh) whose firmware is considered to be the most stable.
A1200E - this is the latest model and comes with firmware that includes EDGE. (EDGE stands for Enhanced Data rates for GSM Evolution or just Ehanced GPRS for short. It is sometimes refered to as EGPRS. EDGE allows for a higher bandwidth data tranfer over a GSM network). Aside from its EDGE capabilities, this phone is not very different from its predecessors. Its firmware's have the audio issues resolved and supposedly better Voice Recognition. However it has one big disadvantage - is only tri-band rather than quad.