KaiOS is rubbish...

If you think to switch from android etc to a KaiOS phone and want to do something more than phone calls or texts then THINK TWICE, the OS is buggy and the company don't give a f about the issues.

JUST read the issues - posted on Reddit :

https://www.reddit.com/r/KaiOS/comments/mbjlzz/contacts_limit_of_100_only/

https://www.reddit.com/r/KaiOS/comments/m6i2fe/nokia_6300_4g_bugs_feature_requests_should_i_send/

https://www.reddit.com/r/KaiOS/comments/m0bnjn/kai_os_needs_a_serious_update/

https://www.reddit.com/r/KaiOS/comments/mikhbr/ok_for_lolz/

KaiOS cockup...

Google calendar wont sync on the -crap- KaiOS, unless change the name of your calendar with your google email. 

You just have to go to your gmail/google calendar page (on a PC browser) and then the options (3 vertical dots) near your calendar, then "Settings and sharing"  , under the "Name" of the "Calendar Settings"  just enter your full gmail address (will show your name again, but don't worry).