Are you having trouble logging into Gmail on an older iOS device like an iPad or iPhone? I had this issue a few minutes ago where I was trying to put in my Gmail password, which I verified was correct, and it kept telling me my username or password were incorrect. After further digging, I found out that Google considers the older iOS mail software used on an iPad or iPhone as “unsecure,” and blocks it.
Here’s the fix to allow Gmail on your older iPad or iPhone.
First, visit http://www.google.com/accounts/DisplayUnlockCaptcha and sign in with your Gmail username and password. If necessary, enter the letters in the distorted picture.
Secondly, and even more important, visit this website: Allow less secure apps and choose “Allow” to let less secure apps access your Google account. This is a less secure option, but, it may be the only way to get your older iPad or iPhone mail software to allow access to Gmail.