I can confirm. It cannot be used as standalone when abroad. I contacted customers service with this issue when I have been in Spain and they told me that roaming is not possible for watch from some technical reasons. Turned out it is not true at all. I just checked and in all other EU countries were LTE versions are available operators support roaming. It is only UK and we who not do it . As usual we are far behind... we need more competition here to force those self assured big cats to deliver what is available for everyone everywhere else .