The vast majority of US ld providers charge rates from 70¢/minute on up for calls to +423 66... Some are as high as $1 or more....I would wager that the vast majority of former +423 holders took advantage of UM's original free replacement sim card with +44 and moved their money out relegating the +423 card worthless and even assuming if +423 arises again, most of those cards are either gone or in a drawer with little or no credit and osmehow I don't think an option will be to transfer back the credit from +44 to +423.....face it United Mobile, RIP.

Most carriers I have seen, do not differentiate between the two prefixes. However there are some that charge lower rates to +4237 as compared to +4236.
Carriers do not bother generally to differentiate charges to those prefixes

Earlier this year I tried calling my +423 number using betamax. For year betamax would not connect but than all of a sudden it would connect. Betamax rates were not that high although compared to +44 mobile it's still double.

Other carriers still seem to charge high rates and the discussion has been here serveral time. These high termination rates kill the platform and make it unusable.

In this thread there is also a reason mentioned, something to do with sex lines and other simular thing in the 423 6 number range. As that will probably not change I don't see a future for the platfrom.

Yes those high priced lines are on the +423 6639 range and also +423662 range (not all but part of it).
These lines are also used by phone 2 pay companies.

Hello again,

On 2lounge.ch "Peter" reports that he made a phone call to the bankruptcy-administrator of United-Mobile. He told him, that Mobilkom of Liechtenstein bought the UM-Platform for themselves. So you can expect, the UM423 platform will return soon.

From the sudden switch off of +423 663 (for outgoing calls) to now its round about 6 months. Reminds me on the Globalsim-SIM-Card connected to Callkey @ isle of man... :-)

Stay tuned and store your SIM card in a safe place.

I have kept my SIM, and just logged in to check on news from the individuals here, as I do not speak german. Thanks in deed for your helpful info guys...

So, after I read everything, I tried to call my number, and it works! My phone rings when someone calls me, BUT when I try to call from my UM number I get a message "call not allowed - network busy"...

So, I guess they are in the process of putting the network up again...?

What company has bought it? What site do we have to get into in order to check on our accounts, etc? Does anyone know?:confused:

Hello,

the situation is a little more complex.
Mobilkom of Liechtenstein bought the necessary assets (special servers, know how) from the bankruptcy-administrator. But another Person is now in dispute because he wanted it (back) too...

Insiders are wondering, if Mobilkom will run the Platform itself or will give the platform to another company. Next question is, if old UM-customers will keep their numbers (I think so) and if they will get their old balance "restored" on a new account?

At the moment, some UM423-SIM Cards are reachable for voice-calls from most High-Quality-Networks (but less from low price or routing via Cheapistan-Carriers), but no Text-Messages (SMS) and no outgoing calls, Balance-enquiries etc.

Just tried my SIM again, and it still registers on Vodafone UK

O2 UK blocked the numbers (both +4236 and +4237) some months ago, for what it described as technical reasons (probably about the tariff really, as they were charging only 17p), and a Betamax brand didn't work the last couple of times I tried (says the number is engaged). My landline pre-select, which is bought via MCI I believe, reaches music which sounds vaguely reminiscent of some 70s US TV cop show. Using BT landline via its 1280 access code works and the phone rings within a few seconds.

Same for me here. Card registers on vodafone network. Cheap voip carriers do not connect. If I use a greek carrier that charges 0,45euros/min calls is connected (CLI) works also. Same If I use my vodafone mobile.

This is mainly for user Prion as I see he is in Greece...

My UM number registers with Vodafone too... I call from my Greek mobile which is a Vodafone one, and the call goes through without any problems...

When I call from my land line, which is a HOL one, again no problems at all...

When I call from a friend's mobile which is a Wind one, again no problems at all...

When I try to call from my Skype account (and I do have a rented number too with them), the call does not go through and I get a message "call can't currently be completed"...