eSIM has been working great for me when traveling to the UK and Canada from the USA.
I have an iPhone 13, which allows up to two eSIMs or one physical SIM and one eSIM to be active simultaneously.
The first time I did this, my primary account was a T-Mobile Connect SIM that didn't allow out of USA roaming. By the second time, I'd transferred to a Boost Mobile eSIM, which, again, doesn't allow out of USA roaming.
When traveling I just bought a data eSIM from a random provider ('BNE' and 'GlobaleSIM'). They have different pricing for varying combinations of data vs. time - a fixed amount per day, a fixed amount with a month time limit, a fixed amount with no time limit etc. They're very cheap compared to how things used to be (I think I paid about $15 for 3GB over two weeks in the UK, and $9 for 1GB of data with no time limit in Canada).
One thing I did not expect is that my US number kept working! With WiFi calling switched on, the non-roaming T-Mobile and Boost accounts just kept working by using VoIP over the data SIM's internet connection.
I have an iPhone 13, which allows up to two eSIMs or one physical SIM and one eSIM to be active simultaneously.
The first time I did this, my primary account was a T-Mobile Connect SIM that didn't allow out of USA roaming. By the second time, I'd transferred to a Boost Mobile eSIM, which, again, doesn't allow out of USA roaming.
When traveling I just bought a data eSIM from a random provider ('BNE' and 'GlobaleSIM'). They have different pricing for varying combinations of data vs. time - a fixed amount per day, a fixed amount with a month time limit, a fixed amount with no time limit etc. They're very cheap compared to how things used to be (I think I paid about $15 for 3GB over two weeks in the UK, and $9 for 1GB of data with no time limit in Canada).
One thing I did not expect is that my US number kept working! With WiFi calling switched on, the non-roaming T-Mobile and Boost accounts just kept working by using VoIP over the data SIM's internet connection.