I have been to many of those countries in both urban and suburban location. Coverage in Europe is generally superior to what we have in the U.S. areas. The fact TMO generally roams on several carriers per area, allows you to select the best if necessary.

Two notes... Consider buying a local sim that covers Europe while you're there. The TMO International Data Pass is a good deal if you are making a lot of phone calls back to the U.S. via cellular. If you want to take the easy, but equally effective data route, I've used Airalo and GigSky without issues.

If you plan to use the free data with Magenta Max, generally acceptable for many basic tasks, make sure you download a massive amount of data before departing. This will advoid the systemic nasty grams about using too much data while roaming abroad.

Safe travels.

I haven't been to Europe for a few years, but international coverage is much better now than in the past. The last time I was in Europe, maybe five years ago, the only issue was data limits. Making calls back home was a breeze. The last time I was in Canada, about 3-4 years ago, the speeds and coverage were great. The only problem was I panicked after crossing the border--it turns out I for some reason had roaming turned off. /embarrassed

One suggestion: at 40 days you'll be pushing the long-term roaming limit. In the two billing periods before you leave you want to use a huge amount* of cellular data and while you are abroad you want to use cellular data sparingly. This will keep you from hitting the 50% roaming usage trigger.

*Google "large test download files"

Depends on your plan and location, I was just over there and only had 256kps, it was a pain getting directions all day, but it's better than nothing. If you're in an older plan that allows some high speed data, check that usage at home doesn't affect the amount. If I go to Mexico or Canada, my usage at home for the billing affects how much high speed data I'll get in those 2 places, maybe their way to get me to upgrade.

Since T-Mobile is German I can also Tell you from personal experience… you’re covered in all the countries you listed!

But of course you won’t have 100% coverage depending on where you are just like in the US, even 5G is spotty.

Somehow they’re a bit behind over there which caught me by surprise as well.

Spent about a week in Germany earlier this year - diff plan than you but I got 5gb high speed data. Not as fast as data in the US but good enough for basic stuff like google maps. It's worth checking what your coverage is for other countries as it will change as soon as your phone detects that you're in another country.

Exactly what plan are you on? Unlimited 5G data in the USA doesn't mean unlimited 5G data in Europe. You may have 5 GB of high data followed by slow data or just slow data.

Been to all last year and this past summer. T-Mobile works perfect.

I never had problems but if I was using it to navigate somewhere kind of out there in the backroads, I'd download the offline map just in case.

I traveled internationally with T-Mobile and I don't think there's a better carrier to have. I would land in a new country, get a "Welcome" text, and then everything would just work. It was great. Even in Latvia.

If your concerned about it get a second E-Sim in country for data only. Many modern phones can do 2-sim operation. I was in the UK and got I lot of data for 30£, cheaper then Tmobiles ask of $50 for 15GB

I've had a great experience with it. You don't even have to do anything before you're traveling, they will grab onto a local network when you land. However I have found it to be much more effective to pay the $5 fee for 24 hr data access. Much easier for smooth mapping -won't be enough to stream with but great for making sure you have the Wi-Fi you need throughout the trip. And if you don't need it overnight or a certain day, you can start the 24 hour period Whenever you like

Just went to Spain in the spring. T-Mobile Magenta, I think, worked fine, across the penninsula to Lisbon. Didn't buy any international plans.

My son recently spent 4+ months roaming in Europe without any problems. YMMV though.

Here’s my posting from yesterday describing our experience: https://www.reddit.com/r/tmobile/comments/13qt55l/extended_international_roaming_4_months_and_no/

Some European providers have eSIM for prepaid. Just research the providers in the first country you're visiting, see which ones offer it, and then get one when you arrive. EU roaming means it'll work in all EU countries, however there is usually a smaller roaming allowance than what the plan is in the home country. For example, Vodafone Spain has a 50GB prepaid plan for 10€, but you can only use 10 or 15GB of it for roaming.

What you are expecting is a huge NO for T-Mobile.

Roaming eSim is also a thing if you get iPhone 14. But the rates aren’t as competitive as disposable local physical SIMs.

I have been a T-mobile customer for over 24 years, joining in 1994 when it was called Voicestream. Durning that time I have travelled extensively in Europe (Italy, Spain, France, Germany, Belgium, The Netherlands, the UK and Ireland.) During all those travels many of which were for periods of over a month (case in point, I was just in Spain for three months this year). never ever once had an issue with using t-mobile. Yes, I have heard and read extensively about all the rules that t-mobile has and that has been posted on here about they will cut your service, block you etc.....but I can say from personal experience it never ever has happened to me and I use data extensively when i travel for my job.....What I have NOT read on here...is an actual account from a person who went and actually had their service blocked or cancelled or curtailed in any way......my honest suggestion to you would be, just go with t-mobile and reduce your data use when you are out and about (unlike the US all hotels and most restaurants/cafes etc...have excellent wifi....of course I would recommend you use a VPN when you use ANY wifi network). As for roaming partners in Europe...most are excellent, but like the US with t-mobile all have gray areas or black spots. Finally, if you do find you need a local sim, they literally sell them everywhere in Europe....prepaid service is a lot more common than the US, so you will be able to buy one with a cheap phone if needed from the time you land in your first country......just my humble two cents...cheers and enjoy your trip, you will love Europe, its culture and its people!

I haven't used it, but Airalo offers eSIMs for travelers.

https://www.airalo.com/

I used Freenet esim. T mobile is good and has a wide coverage.

U are coming to Germany btw 😜why Worying about Network 🥂🍀

I bought an unlimited data sim in Iceland when I was there. Super cheap and just use it for data as a 2nd line. Back then I had Verizon and it had a daily data limit and was $10/day.

Don't think so. I believe that Deutche Telekom is largest shareholder of TMUS. Not sure Vodafone ever owned any of TMUS. Vodafone used to own a significant chunk of VZW I think, not sure if that's still the case.

I don’t think a majority of Asia has esim anyways

Your co worker doesn’t know what he us talking about.

When I traveled to multiple countries in Europe a few years back, I preferred to buy an unlimited data only SIM from the major telcos depending on the country and what was available.

Vodaphone was a solid option since it was inexpensive, and coverage was pretty good.

Having an iPhone helps since you can use FaceTime Audio or Video Calling for on Wi-Fi or LTE/5G sans the data usage. iMessage works flawlessly as well in those instances.

I mean yes, it would. But you could also get a local sim for cheaper. Data in Europe is substantially cheaper.

I recommend just getting a local sim.

Yes, it will work for maps and email great, slow web,

Turn off VM forwarding.

Or google fi

I've been in Germany for around 16 months. Had Verizon when I got here, but turned my data off due to their ridiculous OCONUS rates. Day 2/3, I bought a plan with TKS for 60€ a month for unlimited 5G and its been alright. A lot of my soldiers show up, use their US plans (various carriers), and get 500+$ bills their first month here.

5G works fine in those countries. The 4G LTE is also very strong. A few very remote rural areas sometimes drop down to 2G. Overall coverage is excellent. Learn how to use manual network selection in the event there is an issue. Partner carriers are not static and they charge on occasion. T-Mobile uses roaming steering to push you to their preferred partner

Having trouble editing, so update: The second country is FR (Riviera), not IT. Looks like they roam with Orange, SFR, and Bouygues in FR.

Unless this is a matter of technical nature (like different bands on the U.S. iPhone radios).

I had 5G in most of Europe (Spain, Czech Republic, Germany, France) so I think it should work in Italy too

I had access to 5G NSA when roaming in Canada.

From memory roaming in Italy and the UK was largely on Wind and 3 respectively. You can always select other networks manually if you want, but those are the ones it often defaults me to when I'm there. Coverage is more than fine everywhere on all the networks in both countries for where you'll be.

I can't remember if there was 5G roaming when I was there last month, but it is LTE for sure and works fine for everything.