Call forwarding to UK number on different network, whilst I'm overseas?

[lanceuppercut]

I am currently on an "O2 Sim Only 1000 12M 1GB tariff" and planning to go to the US for a holiday later this year and was going to pick up a Three SIM card for it's Feel at Home package which works out as £10 for 1GB data which will more than cover the time I'm out there for, as there's no way I'm paying £4.99/day for O2's offering!

I wanted to forward my voice calls from my O2 number to the Three number, how will this be charged to my O2 tariff when the device is out of the country?

I assume it will still consider it as a UK to UK forward, so shouldn't cost me anything, yes?

Also, how exactly would I go about setting the forward on the number and how would I cancel it when I'm back in the UK?

Thanks.

[jonsie · Accepted solution]

HAVE a look here....

https://community.o2.co.uk/t5/Pay-Monthly-and-Pay-Go/Call-Forwarding-To-UK-Number-Used-Overseas/td-p...

[MI5]

How to set up here http://service.o2.co.uk/IQ/SRVS/CGI-BIN/WEBCGI.EXE?New,Kb=Companion,question=ref(User):str(Mobile),C... and yes it's treated as a UK to UK number.

[lanceuppercut]

So essentially, with my O2 sim in my iPhone, I do:

** 21 * <my Three number> # <dial>

..then I can swap my Three sim in and that's it?

[lanceuppercut]

I'd forgotten about TuGo, it's a little ropey for me but it's a good option actually! Thanks.

[MI5]

Yup