I'm a T-Mobile customer because it offers the best value for the money for my needs. I only travel overseas once/twice a year, so it's simply an added bonus until I buy a local SIM.

With a dual SIM phone, you can also save money by using the TMobile data for most functions and faster data only when it is needed.

Thanks for the info madison8 and dtsm. I am currently with AT&T, but I don't get reception at home or my office. I am thinking that even if T-Mobile also doesn't work in those locations, at least I will be able to use my phone abroad.

I"m with AT&T and thinking about changing.

They have a good deal with iPhone 6S but I'll be on a trip on 9/25. I'll see if they still offer the same Jump offer next month.

Plus they offer to reimburse you for getting away from other carriers? I'm on the AT&T Next plan so it's not a contract but an installment plan. If they pay off my iPhone 6 Plus, I'll be very tempted to switch.

Both have poor reception at home. Elsewhere around town, I'd say AT&T is generally better and faster in many places.

For those with poor reception at home or office, enable the wifi calling function and that should alleviate the problem. Just be careful if you leave as the handoff isn't perfect.

Sadly, I doubt T-Mobile will ever sell a dual SIM phone. That would allow me to keep the TMo SIM in so that I could call the US via wifi calling; while using the second SIM slot for local calls and high-speed data. Wow, that would be a sweet phone.

Look into utilizing wi-fi calling at home and at work. You might also be eligible to borrow a femtocell for free from T-Mobile to install in your home.

Considering switching to TMO and my concern is not international but domestic. There's something that sounds extremely bad and I want to make sure I understand it correctly.

According to TMO's coverage map, a significant part of the continent (like 20-30%) is partner only. Do I understand correctly that those fall under "domestic roaming"? Because according to this page, I only get 10 MB per month in domestic roaming with the 1GB 4G plan (unlimited 2G data after).

Does that mean if I take a 1 week trip to Yellowstone, I either have no reception or will be SOL after 1 minute of web browsing?

I think I'm wrong. I think partner != domestic roaming. Because TMO prominently advertises their unlimited Canada and Mexico 4G data at no extra cost, and all of Canada is partner coverage only.

Nope, you're correct. 10MB domestic, unlimited international where included (throttled outside Canada/Mexico).

The domestic data roaming limit is by far the biggest downside to T-Mobile. It should be throttled, and maybe somewhat limited. But 10MB is a joke.

That's one reason I switched to Sprint- 100MB domestic roaming seems a lot more reasonable, and their international roaming options are growing (the biggest hole to me is China and T-Mobile isn't too reliable for that anyway). On the other hand, their LTE isn't perfect (I really didn't expect to lose signal in a mall in downtown Spokane).

Yikes. At Howard Forums ppl are saying some of the roaming partners don't have a cap or have more generous cap, ATT is the devil that charges TMO outrageous rates so TMO limits you to 10 MB with them. So if you can roam on non-ATT network then you are in better hands. Now I'm trying to figure out how much roaming is ATT-only. Anyone know?

Howdy!

I just got back from Europe and my iPhone 6 using T-Mobile global data latched on to the LTE networks of both Mobistar and Proximus while there (Mobilstar east and north of Brussels, Proximus Brussels and west - heading toward Germany).

In the UK, it was every carrier, it seemed, except Vodaphone, hopping from one to the other...

On a side note, the Isle of Man, which sort of part of the UK, is not included (I was aware of that going in). As soon as I landed on IOM (9am), I received a "Welcome to UK, unlimited text/web included...", but nothing worked. Finally about noon, I received the "Welcome to UK, Out of Plan coverage, $0.50 text, $1.49 talk, $15 MB costs" messages, with the dial #766# to enable.

In the mean time, I had stopped by a Manx Telecom store to pick up a SIM for the day (£5 for 500 MB), but I forgot to get my iPhone unlocked from TMo before leaving (and my laptop with iTunes is back in the US...). Oh well, a day without internet (McDonald's did have free WiFi though...).

Jim

(Moderators - can someone update the Wiki with the Belgium info, as I do not have enough posts to do so myself? - Thanks!)

https://support.t-mobile.com/thread/93479

640XL Dual sim might support WiFI calling on t-mobile (a lot of non-Tmobile Windows phones get wifi calling on t-mobile). need to do more research

That is the main reason I use T-Mobile.

I spend a lot of time in Canada, so now that it's considered the same as the US, I like it even more.

No more SIM swapping on planes, hitting turbulence, and having six SIM cards fly into the aisle :p

Ecuador
 

Quito
Either Claro or MoviStar (iPhone 5S default)

Santa Cruz
Claro (iPhone 5S defaulted to MoviStar)

Doh!

Now they add the Isle of Man just days after I visited there!!!

Jim