https://community.o2.co.uk/t5/Android/New-LG-G5/m-p/1003354#M58333 If it was an upgrade just use the same sim you already have.<BR />If it was a new activation, contact CS on the landline number from this link <A href="http://www.o2.co.uk/contactus" target="_blank">http://www.o2.co.uk/contactus</A><BR />If your old sim is the wrong size, use this link to swap to new smaller sim. <BR /><A href="http://swapmysim.o2.co.uk/" target="_blank">http://swapmysim.o2.co.uk/</A> Fri, 23 Sep 2016 08:11:05 GMT MI5 2016-09-23T08:11:05Z https://community.o2.co.uk/t5/Android/New-LG-G5/m-p/1003353#M58332 <P>Hello!!! &nbsp;Received my LG G5 yesterday, SIM card etc in and I am sure I need to do something else to activate it, but I cant remember what!? Grrr most frustrating, done an email trawl and been through the O2 site but not sure what I need to do</P> Fri, 23 Sep 2016 08:06:41 GMT https://community.o2.co.uk/t5/Android/New-LG-G5/m-p/1003353#M58332 Anonymous 2016-09-23T08:06:41Z https://community.o2.co.uk/t5/Android/New-LG-G5/m-p/1003354#M58333 If it was an upgrade just use the same sim you already have.<BR />If it was a new activation, contact CS on the landline number from this link <A href="http://www.o2.co.uk/contactus" target="_blank">http://www.o2.co.uk/contactus</A><BR />If your old sim is the wrong size, use this link to swap to new smaller sim. <BR /><A href="http://swapmysim.o2.co.uk/" target="_blank">http://swapmysim.o2.co.uk/</A> Fri, 23 Sep 2016 08:11:05 GMT https://community.o2.co.uk/t5/Android/New-LG-G5/m-p/1003354#M58333 MI5 2016-09-23T08:11:05Z https://community.o2.co.uk/t5/Android/New-LG-G5/m-p/1003357#M58334 <P>Do the sim swap here to keep your number <A href="http://swapmysim.o2.co.uk/" target="_blank">Swap my sim</A></P> <P>If it's a brand new account you need to call customer service on 202.</P> Fri, 23 Sep 2016 08:12:39 GMT https://community.o2.co.uk/t5/Android/New-LG-G5/m-p/1003357#M58334 jonsie 2016-09-23T08:12:39Z