I just bought a Eten M600 a few days ago. After much effort, I have managed to setup the GPRS connection and MMS with my Maxis phone line. However, I notice that every time after I use the GPRS and turn it off, I am not able to turn it on again. I call up Alphatech, which is Eten distributor here, and was told that there is a GPRS matching problem between Maxis and Eten M600 and it would take some time for Maxis to sort it out. If I knew this earlier, I would not have bought this phone or at least wait until this compatibility problem is resolved (if it is ever done). Sigh. Just write this to see other Eten users have the same problem.
Eten M600 and Maxis, GPRS not fully compatible