Remove Caller ID on the Three network in the UK

I use my personal device to call work customers (Unlimited minutes, and I hate having 2 phones!), and until now some of them have gained my number…  Not always a good thing!

I’d previously tried 141 before the number, without success…  Today I found the magic code…  And that code is to dial #31# before the number.  Works a treat 🙂