Where to buy a 3G wifi mobile hotspot in Ho Chi Minh City?

Unfortunately, I only have a wifi-only iPad with me, and I am looking for one of those standalone 3G wifi devices to provide Internet to my iPad as I travel across Vietnam by bicycle.

(To complicate matters, the Lunar New Year means many shops are closed right now...)

Thanks for any help!

Most of the android phones on the market today can act as a hotspot.  Of the ones that I've owned, and I've owned a few, this is the one that I'd recommend:

https://www.thegioididong.com/dtdd/lenovo-a369ihttp://www.faqtory.in/v1/157/can-i-use- … te-hotspothttp://everydaylife.globalpost.com/teth … 33675.html