Syncing stops working for a few days every one or two months no matter which phone I use. Support keeps forwarding to the same usual steps everywhere, even here in review comments. It clearly has something to do with some backend service or how GMail integrates itself with the Android system, seeing how it comes and goes. Just save yourself some time and nerves and use some other email client. Edit: Just like that, two minutes later same useless steps by a bot. This isn't helping your image.