Center functions on Unicom

So, i was doing a flight WMKK-WSSS and Kuala Lumpur Departure handed me off to Singapore Center which was not active at the time, so it switched to Unicom but i could do all the things I would do if i was on Center.

Yep. That happens when handed over as the one handing you over used the shortcut in the ATC menu and handed you over to someone who wasn’t there.