See information for an Iphone Your mobile is an .
Remember to use Chrome

You need to grant permission to your browser so that location data reading gets enabled
When you are in QR4G.com website, you should navigate to your browser Setup options

Then you should type letter "I" for Info:

Then you click on SITE SETTINGS

You should ensure permissions to Access location say 'Allow', otherwise you should click and choose 'Allow'

While in QR4G.com , if a dropdown like this is displayed, you should click 'ALLOW'