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So far all the esims I've got with mobimatter worked flawless, in Taiwan I had to adjust the connection network manually once, but it was a minor issue.
I could use via Android App.
Operator was Singapore carrier.
Speed was not so fast, but there was no complain.
Despite being at the airport, the connection was nonexistent, and even when it did connect, it was too slow to even check emails. It seems to go through 1010, a Hong Kong communication service, but it was completely useless in the Philippines! Should not be sold! I don't even want to give it one star. I ended up buying a new esim from AIRALO using the airport WiFi, which worked smoothly.
Nomad eSIM was easy to buy, easy to use (you just activate the plan from app and turn on data roaming) but in the Philippines it was definitely not that fast.
The one I bought from Nomad connected to Globe 4G, but was actually roaming via Hong Kong (provider called 1010 / csl).
I tried to use tethering at the airport on my way back but the network was sooo slow for some reason. Maybe just the airport, not sure.
Airalo worked okay at least in Manila. But speed is not that high at all and upload speed can be quite slow sometimes. I used it only for messaging, maps, Grab, etc. so was okay for me.
It's a roaming network provided by Singtel so it goes through Singapore with latency of a bit shy of 100ms.
If you don't mind the task of getting a local SIM and swapping it in your phone, you'll get better deal and better latency for sure. But as far as prepaid eSIM goes, Airalo does a decent job I think. You just have to lower your expectation a bit.
I was in Manila, El Nido and Coron. It worked well enough in Manila that I had no complaints. In El Nido, I had to manually select a network for it to work. Leaving it on automatic on the phone will choose the wrong network. In Coron, I had no reception once outside the main town. My wife had a physical SIM card and she had no issues.