Thanks a lot for quick reply!
I currently use HP iPAQ 910 & Dell Axim 51v. We are in process of buying 3-4 new devices. So, we wanted expert's opinion before going ahead.
Main criteria are:
1. Very good wi fi connectivity
2. Unlocked phone
3. Longer battery life
Apart from that, good bluetooth connectivity, a good display, camera, probably a number of sensors like light, accelerometer, proximity sensors (like iPhone or HTC touch diamond), would be 'nice to have' features.
Keyboard type is not much of an issue,(slide out keyboard will be an overkill). Our application is meant to be autonomous and it will interact with surrounding devices with minimal user intervention, so 'reliable communication over longer period' is major criterion.
Also, I would like to know your thought about HP iPAQ 910.
Thanks in anticipation.