2 and a half weeks without cell signal and no problems
I used the diamond wifi buddy for 2.5 weeks in Tokyo, Kyoto, Nara, Himeji, Hiroshima, and Osaka with no real issues. The battery will die over a long day but that is what the backup is for. I was very happy with this service and it was significantly cheaper than paying for international roaming. I would use this device again.
25 July 2019