Replacement sim received but won't activate

[Tammo]

Hi, I received a replacement sim but it won't activate.  Followed the instructions that came with the sim and texted 'SWAP' to 20220 but the message won't send.  Went to o2.co.uk/swapmysim to try activate, but the instructions - with the help of the chatbot - have led me nowhere.  Does anyone know what to do?  It's out of office hours now, can't contact customer services.

[jonsie]

Is your old sim still active

The text to swap is from your old sim

[Cleoriff · Accepted solution]

@Tammo 

A guide here Guide: Sim Swap: a mini guide 2017 update