How to reinstall google play store

"Hi,

Here is a link that shows how to install the Play Store app to your phone or Tablet. Start at Step 2.

http://www.androidauthority.com/how-to-i..."

"1st download the google play store apps >>google play store.apk<<

hope you can use a browser apps on your phone to download the files, you may found it by following this link;

https://forum.xda-developers.com/showthr...

then install the files that was downloaded"

My phone is not install why