Question....message sent to me when my phone is off are stored and I can get them the next time I turn on the phone....so if I'm in the UK and have the UK part active, wouldn't if I switch to the USA number have the message in my inbox.....

Yes, but the SMS are not stored forever. Depending on the settings of the senders phone and the network messages live for 24hours - 7 days, then they are automatically deleted.

Chris

You can't switch to the US IMSI while you are outside of the US. If you're in Britain, you can use the Jersey IMSI only. Calls to the US number will be forwarded to the Jersey number, but not messages.

It would be really nice if they added the ability to forward SMSes and voicemail notifications to your e-mail account -- particularly with respect to the US messages.

Speaking of that, I wonder what happens with voicemails. Two boxes, none, one?

Hi,

the Call forwarding to the Vocie mail works in the Beta-Phase only with the UK Number (if switched off, if not responding, if busy). If someone calls the US number it rings for a long time (if the phone is logged in) and then you hear an announcement, that the phone is not available resp. you hear this announcement, if the phone has no network.

But in Germany the UM+ Network has a problem, as the SIM-Card does not log in to all available four networks. Mostly it takes the o2 Network, but you are not available there, because the o2-Network has technical problem with UK-based o2-SIM-Cards (like Jersey, Manx etc.) . I succeeded to log in in the E-Plus network, Vodafone and T-Mobile don't accept the UM+ at the moment.

I'm still hoping, they will fix this problem very soon, otherwise I would give up my Liechtenstein and my Jersey SIM cards and would switch to Switzerland (Original Swisscom Natel Easy). This is not the cheapest solution, but much more reliable...

I'm surprised to read this. Jersey isn't related to O2, and I've never noticed problems there with the others, indeed they seem to prefer O2.

If United Mobile pulls this off, I'll buy several of these SIMs as present. My partner and his wife carry Verizon Saga's (CDMA + quadband GSM) and travel the US extensively with a small amount of international travel. If they unlock their phone and replace the Verizon SIM with the United-Mobile SIM, it gives them a great backup when they are out of coverage on their home carrier. If United Mobile pulls off the US call forwarding, this will also be a bonus for them. They are from the "don't make it complicated crowd" and this will save them a fortune over Verizon's roaming rates.

Sounds intriguing if United Mobile gives out the sims either free or for a small charge to cover the sim card cost and shipping. Worth a try.
Hopefully they will have accurate billing for this; my +44 UM+ calls from the UK to US were mischarged as more expensive Russia to US calls in late 2007 and I had to contact customer service to have them credit the difference (it was interesting trying to convince them that I was across the street from Kensington Palace rather than the Kremlin). Right now I will depend on 2 US MVNO cards for calls placed in the US. For outside US would use Digicel in non-US Caribbean. For outside the US or Caribbean would use MaxRoam or in some instances UM+, Iridium or Skype. Less complicated than it sounds since I only travel outside the US a few times a year, and not many people need to be provided with the mobile number(s) where I can be reached.
Another possibility is to get a dual or tri sim multiband phone (thinking more of the GSM only phones rather than the GSM/CDMA hybrids) which have been dropping quite a bit in price lately. These are mostly made in China but are exported through various sales channels; some have interesting add-on features like FM radios/TV's/MP3 players).

I made a call from the island of Barbados to the US last march, and yackie billed me as calling from Cameroon, West Africa. The good thing is that I made about 4 calls in total all on the same date. The other calls all showed as calling from Barbados. When I called yackie that it would have been impossible for me to be in Cameroon and Barbados within a few hours. They did refund me and agreed that something was wrong with their billing.

Talking about dual sim phones, I do have one zoho V90 that I bought on dealExtreme for about $90 solely for that reason. Currently have my maxroam and UM+ sims in it.

I have a Digicel (Trinidad) SIM which is still active. I know it has reasonable roaming rates on other Digicel networks. Anywhere else?