Some tests in Poland (6-7.0
- from Poland to my UM+ SIM roaming in Poland.
The SIM logs in to any of the "big three" networks Orange, Plus and Era w/o problems.
SMS
OK from Orange, Plus and Era - arrives after less than 10 seconds, delivery report is available.
I didn't tested Play (as I didn't want to activate a Play SIM which I have) but I suppose it wouldn't work (no roaming agreement with Jersey Telecom).
Voice calls when the UM+ phone was on
Orange, Era, Plus, Polish Telecom landline, Telebonus calling card - the phone rings, no caller ID.
Netia landline - the phone rings, caller ID visible (in Orange and Plus without +48 on the front but it's a stupid feature of those operators and it happens with any foreign SIM roaming in those networks).
HaloKomórka dialthrough service - the voice message (in Polish, generated by the local service provider) "the number is busy, please try again later".
Voice calls when the UM+ phone was off
Orange, Era, Plus, Polish Telecom landline, Netia landline, HaloKomórka dialthrough - voice messages in Polish "the number does not exist" or "invalid number" (operator-dependent).
Telebonus calling card - voice message in Polish "please dial the number followed by #".
Yesterday (on 10.08 ) I tried again to call from Orange and Netia landline.
When the UM+ phone was off I heard a strange busy-like signal. When it was on, it rang when called from Orange. I heard the same signal when calling from Netia, however (the route broke?
)