I didn’t get error code 106 but I did have this problem activating the mobile plan which started when trying to setup the plan on a new Apple Watch on 26th Dec.
At first the plan just said ‘activating’ for a couple of weeks. Tried a reset and re-pair of the Watch before trying again. Then got message …
”Oops something went wrong. Try again and if the problem continues call 202 for free from your O2 mobile, quoting reference code 90.”
Then contacted O2 Support multiple times via phone, Twitter and Facebook. After they did something at the back end I tried again but then got message “We're setting up your Apple Watch on the 02 network and we'll text you when it's all done. If you don't receive a text within 24 hours, call 202 for free from your 02 mobile, quoting reference code 08.”
Needless to say the plan was never activated and every time I retried I got the same message and code.
Eventually with no further help from O2 Support I tried a physical SIM swap as suggested elsewhere in this forum and that seemed to reset the whole process afresh.
I then retried the mobile plan setup and the whole thing completed successfully.
Incidentally when doing a physical SIM swap and you’re on O2’s newer 360 system then not all SIMs are compatible. Store issued SIMs may not be recognised and activate successfully. SIMs ordered via the online SIM swap process should be ok.
