$MANTRA I could not find a Binance notice about a MANTRA (OM) upgrade with a December 2 deadline in the currently available announcements.

So, I can’t confirm that Binance will handle that specific OM upgrade automatically yet. If Binance supports it, the official notice will normally state that Binance will:

suspend OM deposits and withdrawals around the upgrade or migration;

take the relevant wallet snapshot, if required;

complete any technical processing automatically for eligible Binance balances; and

reopen deposits/withdrawals once the network is stable.