Hello there,
due to the new tariffs at
United-Mobile incoming calls are charged with an
one time event price of
19 Euro-Cents per Call plus incoming costs (if apply), even, if you are in a "
free incoming" country. This applies up from to today to
UM+ and to
UM423 SIM-Cards
First of all this
19 Cents applied to UM+ (+44 7937 Isle of Jersey) and led to the funny situation, that
calls which were forwarded to the voicemail, where charged, too. This led to the not funny situation, that my account melted down during people calling to my mailbox. At least my number was told "
The subscriber is not available".
I contacted the CEO of UM, which confirmed me that there was a mistake in their systems and they repaired it today.
Calls to Mailbox are not charged any more 
Seconds the
"Balance" Call to find out the balance of my UM 423 (+423-663, Liechtenstein) was charged on Wednesday with 3 Euro-Cent per call.
This was another mistake, which was fixed today, too.
Calling short code 089 to ask for your account-balance are
free of charge again
I'm living in Germany, so incoming call costs my one time 19 Cents, no matter,how long the call would be.
UM+ SIM-Card registers with all german networks.
UM 423 SIM only registers with E-Plus-Network, at this time. If you try to send a Text-Message (SMS) from your UM423 (registered at E-Plus) to lets say T-Mobile.DE you will get an error-message. The Text-Message is charged with 29 Euro Cents, but will refunded automatically a few minutes later back to your account.
My UM+ is at 0.05 EUR at the moment, i've changed the mailbox greetings, announcing my german phone number.
My UM423 is at about 2 Euros at this time. I would appreciate, if it would register with all four german networks.
Some time ago, I tried to call +423-663 from a T-Mobile.DE contract-SIM registered at T-Mobile UK. I got the response "number not allowed". Same thing happend at the network of T-Mobile USA (Florida) with my T-Mobile.DE contract-SIM. Anybody can tell me, if this is still the case?
I'm using Liechtenstein SIM-Cards for a long time (starting with MONTEL from VIAG Europlattform in the late 1990's) but I'm not sure, if I will need it for the future. Maybe I'll switch to my NATEL Easy Liberty Uno from Swisscom. It's not the cheapest one, but it works.