Guys You Have Two Choice 1 Will definitely works
For Updating 0.16.5 Update of Pubg Mobile Follow the Below Steps
Step 1) You have two pubg account main acc and fake account
Step2) Download Solo VPN From Below Button Link Then connect it to USA Server
Step 4) After Connecting VPN Then open pubg mobile on ur 2nd id You get update notice of update 200mb update it
Step 5) You not get Notice then you close all applications and go to setting>>apps>>Pubg mobile>>Storage>>Clear data after this restart the pubg you get update
For Another Method You Have Wi-Fi So it Can Be Works
Steps For Download 0.16.5 Update Pubg Mobile
If you have Wi-Fi with unlimitted data then you can go this process else wait for Store updates
If Wi-Fi Available Then You Can download APK File Of Pubg Mobile and Old Pubg Uninstall .
When Complete download of apk file of 0.15.0 then you install it.
After apk install open pubg mobile and you get automatically downloading obb file in background of mobile.
It takes some time because its size around 1.8 GB
after downloading all file then open pubg mobile
you updated version you can get.