Guys download waze! It's an interactive gps system which allow users to report traffic, police both visible or non visible, weather and many more!!

Most important of all it's free! No maps to download you can use it all over the world as long you have data I guess cheers!!

It's fast and simple ! Definitely no regrets

Roaming will always be expensive, be it calls/ data, sms still acceptable.. i think maxis have a unlimited data plan in certain countries, i remember my friend took up the plan before.

anyways there are other alternatives, you may change to a local sim card if you would want to safe cost like what i did in australia recently, i bought a 20 aud prepaid plan for 2 weeks and it was sufficient and waze doesnt take much data and its really efficient!