Im using Touch Diamond and it works very fine. the only problem is very low batery life(when GPS and bluetooth is on). But if you want to use it only for trainings it should be no problem.
After having a lot of troubles with the GPS connection with my Omnia 900i I'm thinking of buying a used HTC Touch Diamond mobile to use it only as my training tool. Before I buy one on ebay I just wanted to ask if somebody of you had already made some experiences with this phone? Or do you have another recomotation for a "older" (1 - 2 years) old model of mobile as a functional GPS tool with the GPS software? Hope some of you will help me in this case.