The wiki mentions Airtel for India. Did you connect to another provider? Did you attempt to manually switch to a different provider?

T Mobile Global data coverage
 

Not sure what the provider was called Rogers or so?

When I try to do it manually the phone doesn't find anything (just the "I am working symbol")
But now it connected to Airtel 0.12 down and 0.16 up
Had Wifi in the Hotel so it wasn't a problem

Just Had an Amazingly Clear Conversation Using Whatsapp Voip and Tmobile Global Data
 

A friend of mine is in the UK now with his Tmobile phone (Moto x Pure 2015), using the free data roaming.

We just had a very clear conversation using the built in VOIP in Whatsapp. About twice in our 5 minute conversation there was a 10 second gap where we could not hear each other at all - the rest of the time it was very clear, no voip stutter or the like. It seemed that the quality was binary - either it was very clear, or we couldn't hear at all.

I was surprised that there was no noticeable latency - given the high ping times that I have seen on Tmobile while roaming.

T-Mobile (UK) had LTE for my iPhone 6P A1534 model. Updated wiki for Portugal, too.

Just used it in Turkey and France with an iPhone 6S.

Turkey: Defaulted to Turkcell, but was unable to get data. Manually selected Vodafone and data worked fine the entire trip. Not blazing, but decent.

France: Defaulted to Orange. Sloooow. Manually selected Bouygues and it was much faster.

We just spent a week in a little apartment without Wifi on the French Riviera, the longest I've ever gone without.

One night I talked Mrs. Fredd and myself into trying the $25 seven-day 200MB pass on my iPhone 6+. It sped things up nicely, but after I surfed for a couple of hours and played a few games of Words with Friends I got a notice that I'd used up 60% of my data. When I woke up the following morning I got a notice that the rest was gone. :eek:

We were literally driving home from SEA a week later when I got the message that my international data pass had expired.

I've never gotten a good sense of data use, and I've tried making a few adjustments since then, e.g. turning off Background App Refresh, but I don't know if there's anything else I'm missing.

Suggestions welcome! Please be gentle. :D

200 MB is nothing.

Updating apps. can burn it up. A lot of apps. are over 50 MB each.

That makes sense. Since I've cheerfully exposed my ignorance, I'll follow up with one more question: In what kinds of circumstances could that 200 MB package be useful to somebody, other than "emergency"?

200MB is useful if you've setup your phone's data usage policies with update apps/iOS via wifi, don't auto-refresh most e-mail accounts or poll on a longer interval, don't auto-backup photos to cloud, and no background data for most apps. I also don't have features like wifi-assist enabled.

My own rule of thumb for "travel mode" is to estimate ~ 100 MB per day. This consists of map apps for navigation, transit apps, light e-mail usage, a 1-2 photo uploads and ~ 20 photo downloads (instagram/twitter/etc), and light web based text messaging. I wait until I have a good wifi connection for larger bulk downloads like videos or playing games which require internet access.

people who are rich and don't want to bother with buying foreign sims

Thanks! That is really useful information. ^

:D

In the past, when I purchased an International data pass, I'd enable "Airplane Mode" once my phone connects to the foreign carrier. I only disable it when I need to access the Internet and don't have access to WiFi.

When I charge the phone overnight at the hotel, I make sure to leave it on Airplane Mode. There had been times I wake up and noticed my iPhone 5S (on iOS 7.x) no longer connected to the hotel's WiFi.

As you own an iPhone 6 Plus, iOS 9's "Low Battery Mode" appears to do the same by disabling Automatic Downloads and Mail Fetch. It also disables Background App Refresh which would prevent apps from accessing the Internet unless you're actively using them.

Thanks! That all makes sense. I've seen the Low Battery Mode since getting the latest update and will make more use of it. Most people may know all this already but that's new and useful information for a technical neophyte like me. ^

Just used Tmobile data in Uganda worked pretty well when connected to orange uganda. Could do facetime and whatsapp a lot of the time. Even worked in the 'impenetrable forest'

Love T-mobile

Guys, how do you avoid getting charge on voice calls roaming while using the global text & data for free?