Hi, I am currently traveling in philippines and bring along my iPad with me. I just bought globe tattoo prepaid sim and cut to become micro sim. My ipad 3G is working flawlessly and connected anytime with my micosoft exchange mails. I travelled from north, manila then to south and the connection in Stable.
However, I am paying 5pesos / 15minutes which is a little bit expensive compared to my china unicom sim.