I am also having problems pairing, to IOS, please give instructions how to roll-back to a working version.
Currently working on version 1.7.62 (same issue with 1.7.60) and IOS 11.2.1
I rolled back 1.3.522 with hope that it may solve my battery drained out problem.
But the problem is still exist.
Could I use 1.7.62 again for my 1 year and few months old Runnner3.
I got my spark 3 on Christmas Day, it was syncing perfectly. However I connected it to the laptop and Tom Tom connect yesterday& ever since it won’t sync via Bt to my iPhone, I am having to keep plugging it into my laptop to view my activities. I am very disappointed. Can you give me any idea of when this will be resolved or should I return the watch to Argos & swop for the Garmin ??????