How Much is a Local SIM in Vietnam (MobiFone)

During our trip to Vietnam I purchased a local sim card, MobiFone and was satisfied with its capabilities. Cellular phone signal in Vietnam is not difficult to find and it makes communication among our missions team easier and a lot cheaper. Instead of using our lines for texting and calling with the roaming charges, we were able to do them more liberally using the Vietnamese local sim. The MobiFone sim cost 150,000 VND (around PHP 300) and is preloaded with 50,000 VND (PHP 100) worth of load. It is very much available in convenience stores. With it, I was able to enjoy my music phone and at the same time use its call and text capabilities using other music as ring tone.