JazzGal,
Is this the post you were looking for? I did a cut-and-paste job when it appeared, and saved it:

I don't know if this is appropriate or even possible in your situation but it is worth a try and takes a few seconds. We have used wifi calling everywhere we travel with no charges at all..no sims...no special calling plan needed...nada....France, Spain, Caribbean but we do have Verizon not T-Mobile but I also did see this on the T-Mobile website:

"Every Wi-Fi connection works like a T-Mobile tower.
You can use your phone to make calls and texts anywhere there’s Wi-Fi. It’s easy. Just connect your phone to a Wi-Fi network and it’s all set. No additional apps, logins or costs required"

Right now...just put your phone in airplane mode (wifi/cell signal will shut off )...turn wifi back on...wait 10-15 seconds....make a call....it should work and ,if it does, it will work ANYWHERE there is a wifi signal with no worries about whether there is a working cell tower where you are. Incoming calls will work like you are at home.Only downside is that you will need wifi.

Yup....mostly phones issued in the last few years or so. Verizon has 17 models, AT & T 23 models with WIFI calling. I have a Samsung S7 and it works great. If you are unsure just try it from home. Remember..you will also receive calls wherever you are when connected to wifi. As I said, my cell is ALWAYS on airplane mode at home...I just take it off when leaving the house....MUCH better call quality in my situation.

I just think it is a no brainer with near zero effort needed.

In iOS 9, Apple is giving us the option to choose which connection is best to make a call (Wi-Fi Calling), as well as making iPhones able to switch back and forth in a way that’s both automatic and seamless (Wi-Fi Assist).

[/i]
iOS 9 will also include Wi-Fi Assist, a feature that automatically boosts your connection by relying on a cell signal when your Wi-Fi is weak.

Complaint re: charges:

[i]Is anyone else having a complaint about WiFi assist on iPhone 6? I am a new customer and was charged overages due to this. I was unaware of this needing to be turned off in order of not getting overages.

It is VERY important to put your phone in airplane mode and keep it there. Otherwise there may be charges. WIFI assist cannot work in airplane mode

Also I made three wifi calls to a rental owner from MA to France and there were zero charges. Should be no different calling to a location on SXM...NOT with wifi assist enabled though.This, again, is with Verizon AND on airplane mode.

Full disclosure: Both AT & T and Verizon websites state that there will be charges for wifi calls made to international destinations, With airplane mode enabled I have never incurred any charge for any calls to any country. They have no clue where you are. They do NOT mention enabling airplane mode for a definite reason (charges). Just relaying how it is for me with my S7 and Verizon.

When you are out of country make a one minute call to a location NOT in the USA ...airplane mode on...wifi calling (NOT wifi assist) enabled. Check your account in a couple of days and see if there are any charges. Worse case you might have a one minute charge but I would be shocked if it was there.

I had no clue that this worked until I unexpectedly received a call on my cell while in SXM from my bro in law in Virginia. How could that happen? I'm in airplane mode....but I am in my room with a wifi connection enabled., Been using it ever since that epiphany (after a couple of test runs)

I routinely make calls to family in Nova Scotia (from MA) and never have been charged. I have made at least three calls to France from MA and never have been charged. I have called a French cellphone from an apartment in France and never have been charged. The key is AIRPLANE MODE ON! WiFi turned back on. Repeating myself: If you do NOT enable airplane mode you WILL be charged. Just relating MY experiences.

I kinda give up...I was just trying to offer an extremely easy an inexpensive alternative that has worked for me and my friends.

I will take some success in getting some to confirm that calling the USA from anywhere works....the rest is another issue left for the adventurous. Unless you have tried it then every comment about how it works is purely speculation.

BTW...I don't think I mentioned texts,,,same deal. You can receive and send texts also.


We go in airplane mode as soon as we get on the plane and stay that way until we return and make as many calls/texts as we want for zero cost.