I have trouble adding my gmail account iOS 9.3.1

Hi Sanjibipn,

Thanks for using the Apple Support Communities!

I understand that you are not able to add your Gmail account to the Mail app on your iPhone. Without knowing what is happening when you attempt to add the account, I would first suggest reading over and working through the steps in the following article to add the account.

Add an email account to your iPhone, iPad, or iPod touch - Apple Support

If you continue to have an issue, please let us know more about what happens when you try to add the account.

Best!

i have the same issue and i did all the steps but nothing at the end unfortunately.