When im downloading pubg on my Android after 260mb...

Welcome
Dear customer you can try to fix the problem by restarting your phone and try to delete play store and google service cache data by going to Setting > apps then click on them and click clean cache data
or you can try to install pubg from here click here then click download XAPK 

and download XAPK installer from here then click download apk then install it to use it to install the xapk file

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Best Regard
Yousef Saleem