[spike021]

I've tried travel eSIMs (Ubigi) on a couple of trips to Japan. In my experience compared to when I've gone and used physical SIMs, the reception and coverage wasn't nearly as good. Just super random neighborhoods and areas where the phone just completely drops connections. Even the top of a mountain near Fuji, my eSIM failed completely but my Japanese friends with eSIMs had completely normal and fast service despite supposedly being connected to the same network (DoCoMo iirc at the time).

Not sure if it's an eSIM issue or that the service (Ubigi in this case) that fronts the cellular network just can't operate it smoothly or what.

[bmoxb]

I can say for certain of course, but I would guess at that being the result of the poor service that travel network providers typically offer. I have also used travel eSIMs in Japan and had generally a pretty poor experience (bad coverage and slow speeds). Conversely, I've had non-travel, regular monthly eSIM contracts in both the UK and Germany and experienced few issues (at least no more than my experience with physical SIM cards).

[weikju]

> Not sure if it's an eSIM issue or that the service (Ubigi in this case) that fronts the cellular network just can't operate it smoothly or what.

Or the bands supported by your phone. Could be any of these possibilities