You don't need an internet connection, just follow this solution.fwiw switched off airplane mode but didn't connect to wifi, flipped internet time sync on and launched switch-time. Set current month/day (but didn't change year as it was showing 2017 and couldn't see quick way to change that without hundreds of button presses!?); re-did bcat. still 1.2.0!
Decided to use 90dns and connect to internet to sync time. Now I get 1.2.0a. It's taken a lot of time/attempts. Me thinks it isn't worth it but hey ho.. maze might keep daughter quiet for a few minutes.
https://gbatemp.net/threads/noob-fr...vent-manual-unlock.561530/page-4#post-9039852