on 19-09-2019 20:05
on 20-09-2019 20:35
on 20-09-2019 20:39
on 20-09-2019 20:39
on 20-09-2019 20:59
on 20-09-2019 21:11
on 20-09-2019 21:11
on 23-09-2019 10:00
on 23-09-2019 10:00
Hey @AlexxH100 I've sen't you a message about this one so please take a look and get back to me when you have a minute.
→ COVID-19 support - Help and support from O2 during the lockdown
→ Access for You: Registration - Find out how to register for our Access for You service.
→ Just joined the community or thinking of registering? Check out this handy starter guide!
→ Have a query about your account? login to My O2 for help
If you'd like to take part, why not register?
on 23-09-2019 15:21
on 23-09-2019 15:28
on 23-09-2019 15:35
on 23-09-2019 15:52
28-09-2019 20:05 - edited 28-09-2019 20:08
28-09-2019 20:05 - edited 28-09-2019 20:08
Number blocking takes place on your handset so the network would deliver the call to your phone but as the number is on your block list the phone simply doesn't ring or give any indication the blocked number has tried to call you.
As soon as you switched off airplane mode I suspect your phone will have registered on a local network (switching off roaming in the software is supposed to prevent this but this isn't a guarantee and I certainly wouldn't put money on it).
When the home network is not available the phone will look on the Preferred Roaming List stored on the SIM to see if any it can detect appear on the list, if there is more than one it will select whichever has the strongest signal and begin a registration process.
At this point the network it is trying to log onto will request some data from the SIM, this will indicate you are a customer of O2 UK so the servers will contact O2's servers to authenticate this information and ensure a billing arrangement is in place so they can bill O2 for your use.
At this point O2 will begin to forward calls and texts and keep a billing link open with that network until one of two things happen;
1) It receives an authentication request from another network in the same country or elsewhere.
2) It receives an authentication request via the UK network (as happens when you switch on or restart in the UK) indicating you have returned home and that it should revert to delivering calls and texts as normal.
If someone calls you when you are roaming, they hear the ringing tone generated by the local network while your phone is ringing and, depending on local regulations, business practices and the roaming agreement between O2 and the network you find yourself on, it can be possible that you are charged for the remote network even attempting to connect your call.
In short, if you want to exclude the possibility of this happening, buy a tablet or remove the SIM from your phone and keep it in a safe place BEFORE you switch on your phone when you get off the plane as without a SIM inserted the phone won't be able to log on but as I said above, once it logs on, the roaming forwarding can remain in place until your phone logs back on in the UK, even if it is switched off.