For a long time Google maintained an option for “Switch to Basic Mode” Mode due to some reasons like network slow connection and browser capabilities. Now Google silently removed this option from the Gmail. But still you can get it while Gmail loads. How to get it once entered in to the mailbox. This is simple.
Once after entering in to the Gmail’s mail box. Change the address bar URL to https://mail.google.com/mail/?ui=html and it will automatically loads the gmail in a “Basic Mode”.
Hope you will start using basic mode again.