141 Does not withhold number on O2

[Barry Scott]

I called a colleagues work's mobile with my iPhone and the number had 141 in front of it.
To my astonishment, my number came up on his display

I wonder if the 'Show My Caller ID' completely overrules the prefix of 141?
Mine is set to show - but it was on my previous phone - and typing 141 always used to withhold the number.

Has anyone else come accross this issue?

 

[Barry Scott]

Eureka! I've just answered my own query - I saw another post which states the GSM standard allows you to type #31# before the number you wish to dial and it nicely withholds your number!

I have just tried this and it worked a treat.

 

[splashtech]

Great! Thanks for that! I've always had to go into the settings on my phone (T-Mobile/UK) to get that to work. 141 worked on my old Orange pay-as-you-go, but not on O2. I will try this now I think...

 

[Prince Charles]

Eureka! I've just answered my own query - I saw another post which states the GSM standard allows you to type #31# before the number you wish to dial and it nicely withholds your number!

I have just tried this and it worked a treat.

Thank you so much for that! Been looking everywhere.

Mark

 

[nomad01]

Don't get it...

Show My Caller ID is set to ON on my iphone.

I've dialled a land line with 141 at the start and it's witholding my number as I'd expect it to.