You can acquire custom room in 「PUBG MOBILE」 after upgrade your account level up than Lv.5 by using "Room Card".You can gain "Room Card" from the Royale Pass and clan stores.
After you gaine the "Room Card",please acquire custom room on the following procedures:
1. Select "Select Mode".
2. Select "Room".
3. Select "Create room".
4. From the pop-up, select "Use".
5. From the item use pop-up, select "OK".
6. Select the name of your room, game mode,map and password then select "Create room".
This is an item with time limits. Once you create your first room, a time indicator will show up on the bottom of the screen and you can check your remaining time from there.
Once you create a room using your "Room Card",you couldn’t cancel the action and get your "Room Card"back.