Summary: I used this wifi device in in south Vietnam (Ho Chi Minh & Can Tho) and it worked beautifully. I traveled there 7/24/15 - 8/2/15. Internet reception was quite reliable. Connecting to the device was easy and worked just fine. I didn't encounter any problems.
Do NOT purchase DWR-730 - company has discontinued service
Greg Scully, Amazon
3 July 2015
Summary: In June 2015, I purchased a brand new DWR-730 portable router while on assignment in Cambodia. The router worked fine for 2 weeks in Phnom Penh. In July 2015, I was in Japan and tried using the same DWR-730 inTokyo.
Summary: This product is ideal for people who are travelling with multiple smart devices, either of family members or oneself. Works as a charm. Setup very easy, just takes 2 mins. Automatically configures for all mobile networks. Just insert sim card and you are ready to go.