We all know the issues (time lag etc.) with the GPS on the TP2. Why a thief would put a new simcard in the phone outside. Probably he/ or she will be inside, where no GPS signal is available.
in case of Maspware guardmobile.. the moment u realised that u lost ur phone, u can send it a secret sms which will activate the software to do the things i mentioned above.
1) It can give out a loud ring... which a thief can stop... if he removes the battery..
2) be discreet.. send a secret sms to trace where the thief is running with the phone... i think u get a location update every 15 seconds...
3) call the phone - auto pick up... and threaten him.... or whatever... if u r smart.. negotiate with him to return the phone for a small price...
see.. there are ways!