Use at your own risk and be assured that you will definitely be billed thrice the actual amount!! I had used Clay Sim Card for Thailand and experienced every word that i just wrote. Poor signals across the island, therefore calling was actually impossible. Customer ppl had no idea about extending any support! And finally when i scrutinised the bill i saw that some calls were billed thrice with gaps of few minutes! Guys just be careful of Clay Sim Cards.. Not worth it !