In my experience, the most likely cause of this problem is a poor data signal.
I encountered this problem yesterday the same place that I encounter it most of the time — at the Atlanta Hartsfield-Jackson Airport, right after my plane landed while taxiing to the gate.
Fortunately, making the beta available to the public resulted in more bugs, glitches, hardware and software issues being discovered, which gave Apple a chance to fix them before the official release.
That said, it’s always convenient to have one place to find any and all i OS 10 problems, which is where we come in.
Read this guide to get some suggestions to fix the annoying i OS 10 email issues.
The solutions can also be applied to i OS 10.1 and i OS 10.2.
People came to grips with the new features during this period, but there were some i OS 10 problems that Apple didn’t catch.
Sometimes extensions or add-ons you've installed on your browser or applications you’ve installed on your computer can prevent Gmail from working.
Try temporarily turning off these extensions and applications one by one, then using Gmail again to see if that solves the problem.
It has been a few months since the release of i OS 10, and many users updated their i Phone/i Pad to the new operating system the first time.
It has introduced many new features, like the bubble in i Messages or the bedtime wake up alarm. Also Read: How to Delete All Emails on i Phone/i Pad At Once However, just like the previous i OS 9 update, many Apple users have reported that they meet some issues after updating to i OS 10 just like you.