Hello there,
there are too many questions what happened.
Did UM leave the (Mobilkom) Liechtenstein Plattform on its own decision or has the Austrian Headquarter of Mobilkom lost its personal interest in creative roaming-tariffs, as the by the European Union down-regulated roaming-tariffs reduce the possible margins in this business?
Why did Jersey Telecom switch off their system suddenly, without any notification? If a system is switched off, normally an announcement informs the callers, like "We are sorry, we cannot connect the desired call" or something like this.
Too many questions.
Why were the UM online Shop and the personal account closed so suddenly?
Why is there no official statement on their Homepage?
The regular customer sits at home and does not discuss this questions. He wants to make calls either a lowest prices or at maximum quality or stability. If he paid money, he wants to know, if this money is gone or will come back.
I think, there is still a chance that UM will come back some day. But it will be a very hard task to regain the trust of their long year customers.
Business is not always so cute as a love-movie in the cinema, but some customer information even when there is trouble ahead is crucial for trust of customers in "their" company.
To speak it clearly:
For European customers the "damage" is not so hard - as the current Roaming-Regulations give interesting prices to customers roaming inside the EU.
For international customers or people who want to make phonecalls from or to non (EU) European destinations the alternatives are very rare and nothing than reliable.
Isle of Man (IoM): Switching-Cabin "Callkey" switched off suddenly and the customers had to suffer and to wait. OK, they came back, but many customers didn't return.
Isle of Man is used by various companies like GT-SIM , Globalsim and others.
Jersey Island: Was first discovered by United-Mobile (UM+) the Voice-Mail-System is located in Germany. UM used the prefix +44-7937, which is completely shut down.
At the moment Jersey is also used by Sim4Travel (AKA Truphone) which hijacked the domain
Avoid United Mobile problems with a free SIM upgrade from SIM4travel and which uses a +44-7509 prefix. Are the switchboards of UM and S4T located in the same City, the same house, on the same floor? Could a technician have changed some cables in error? Not for such a long time.
Iceland was used by 09.is It is gone, due to the economical crisis.
Some offers tried Israel (+971) SIM Cards, it didn't work as some customers exspected.
There are cards based in Estonia (+372). Calling this number from various countries suffers similar problems as calling +423-663.
On new offer is located in Belgium (intra EU). Have no personal experience with it yet. (Using +32-486 Prefix)
Weird enough: +423-663 Platform is still up and running. May be it was a mistake to shift all the money from +423 to +44
My personal crystal ball says: +423 will come back
This my personal crystal ball. I have no proven facts on this opinion. Time will tell, if I were right