Tuenti is Telefónica owned MVNO. That means that they operate with their own 21432 IMSIs in Spain and buy services from Telefónica and Movistar under more or less the same conditions like other MVNOs on the market do. For roaming they use the Telefónica/o2 roaming platform (21407 IMSIs) which according to them does not enable LTE roaming for Tuenti customers.


According to A1 two Months ago B.free was not yet enabled for LTE roaming. Just 3G and 2G:
https://www.a1community.net/b-free-3...roaming-249089

Maybe this is still the same. I could not find any comment claiming that LTE roaming has been enabled for B.free meanwhile.

OK, maybe the customer support person didn't know what she was talking about then.

Of course the carriers don't disclose what kind of roaming experience you can expect.

I just got to MUC on the S-Bahn. I got 4G on Vodaphone along the way and continue to get ~10Mb/s at MUC. OTOH from Kufstein to Muenchen speeds varied based on location, often excruciatingly slow.

4G is good but 10 Mbps isn't that great.

Like I said, when I was roaming on 3G, I was getting 7-8 Mbps.

10Mbps is fast enough for my needs in general and especially when roaming in a foreign country. For me roaming access is far more important than blazing speeds.