I am going to be living in France for the next year. I want to keep my US mobile phone number, and I would like it to be somewhat usable while I am out of the country, but I can't find an affordable way do set this up. I am hoping someone here has some more insight for me.

I am going to be buying a French mobile phone plan (most likely through Orange) that will cover my data usage, along with a local number for calls and texts. I already have either whatsapp or imessage set up for calls and texts to/from my family in the US. Ideally, I would like to have my US number on a second sim on my phone. I wouldn't need any roaming data for that sim, just calls and texts, and my actual usage will be very small.

Here are the solutions I have explored:

1. Porting my number to Google Voice. This is probably the best solution, but I would like to avoid google if at all possible. This costs only $20 with no monthly fees. This would require me to use a separate app for this number. If possible, I would like to be able to use the iPhone system apps for calls and texts.

2. Some MVNO with international roaming. So far the best I have seen is Ting mobile. It costs $0.30 per minute calls and $0.12 per outgoing text. This pricing would be perfect for my extremely low usage. However it requires a $10/month pay as you go plan which is more than I want to pay.

3. IoT sims (although I am almost positive this won't work). These appear to be sms and data only, so for my usage they would be sms only. Telnyx is the service I found that actually supports esim (my phone has only esim). I am having trouble with the console, but I am trying to get an esim on my iphone. If this can work, it would be only $2/month plus usage, which would be perfect.

Are there any other possible solutions that I should look into?