If you have an iPhone, you can use IMS to send/receive texts and calls using RP WiFi and the data of the local eSIM. I have used RP AT&T with IMS when traveling to Europe. I have no experience with RP using an Android phone. RP AT&T doesn’t charge minutes to check voicemails but RP T Mobile does. I was not on an unlimited plan.

Which RP plan are you considering? After leaving post paid, I have bounced between MVNO’s before settling with Total by Verizon.