Thus spaketh Phil Thompson:
> On Sun, 22 May 2005 12:48:51 +0100, "Philippe Deleye"
> <Philippe_Deleye@hotmail.com> wrote:
>
>> I can't believe this.
>> Please tell us where you were and what local UK number you dialed in
>> the UK format ??
>
> this happened both in Poland and in the USA. In both cases I didn't
> believe it either, a travelling companion (different in each case)
> couldn't get through and I said something along the lines "of course
> not you asshole you haven't put +44 in front and docked the zero"
> however they were insistent it had worked previously and when they
> handed over the phone I saw it with my own eyes.
>
> It isn't error prone in the USA as the area codes and the long
> distance prefix are both non-zero, so it would be reasonable to assume
> that a UK mobile dialling 01283 xxxxxxx is calling the UK.
>
> The CLID was also messed up in the US (ATT Wireless at the time) with
> 01144 added to the front and digits falling off the back. A
> non-compliant mess.
>
>> Indeed, in some countries, if you are using a provider that has a
>> special agreement with your own provider, then it might be possible
>> that they allow you to use the usual short codes for Voice mail ea
>>
>> But we were talking about real UK numbers (not special codes)
>
> agreed
>
>> I just repeat myself: You can only call a UK number from abroad wenn
>> dialing the correct international format +44 xxx
>
> argument by repeated assertion is not an argument. In any case the +
> can be replaced by the relevant local code for international access
> (00, 8, 011, whatever ).
>
> Phil

I have had friends on T-Mobile and O2 PAYG mobiles in the past and they only 
needed to dial UK format when roaming, do not know if this has changed.