I cannot get that link to work. I tried leaving off the &name.. part and it still didn't load. FWIW, billionconnect is a Hong Kong company, which IMO might as well be a peking company due to the laws forced upon the Hong Kong people by the ccp. Maybe I'll go watch June 4th documentaries on my world-esim connected phone at the end of trip to use up the remaining data

I did see this one

I was not aware of this one.
I don't either. I've had Androids until the last family phone update. Wify wanted iphone so I ended up with one too. I used to compile my own Android builds to run on my HTC phones.

I had a chance to run the meter.net test against the Japan server on the world-esim and got 123ms ping, 18.45 Mbit/s down and 1.48 Mbit/s up. Funny thing is that it is now connected to Softbank 5G, rather than Rakuten earlier. Same physical location as when I first activated the world-esim.com esim.

Nostalgic phone nerd anecdote follows, feel free to stop reading...
Many years ago, on a trip to Japan, I had a friend of mine who lived there help me get a KDDI phone (flip phone that had multi-tone ringtones when most western phones was still buzzing monotone) on a prepaid plan. Sat in a phone store and he navigated everything for me, used my passport, etc. We ended up in a rural area (think farms) visiting a friend of his, and the friend's family all had their Docomo phones in one spot of the house, as that was the one spot that had reception. My KDDI phone had a better signal there, where it did not have to be in that one spot, like sitting at the dining table. KDDI was still running CDMA 2G (EVDO was not out yet) on their 800mhz bands back then, and I'm guessing Docomo was using 1.5ghz band. I'll always have a soft spot in my phone nerd heart for CDMA.