Register for PUBG contest inside Fanspole. This is mandatory. Make sure that your PUBG ID is correct.
Else, you will be unable to play.
15mins before the contest starts, you'll receive joining details for PUBG
Open PUBG Mobile app on your device
NOTE: You should have already played al least one game of PUBG after installing.
Tap on the section as shown in the screenshot
Tap on the Room option as shown in screenshot
Enter the Room ID in the text box shown in screenshot
Enter the password for the Room as shown in screenshot
You have joined the PUBG room successfully. Please wait until all the players join. The match will start automatically when all players join or at Contest start time. whichever is earlier.