I don't think this supports 3g ...I haven't found one yet that can be used over 3g in Australia.
Well at Colombia is Ok, they are using 2g without any problem
Keep in mind that a lot of mobile - cellular service operator had announced shutting down their 2G in 3G networks in the next 2 years
Can you recommend any gps tracker device for bike, im thinking to buy this one. Anybody Did test this one before?