Sudden Network connectivity issues, timeouts, or sending or receiving of the massive data file are a few reasons.Such errors don’t get resolved on their own and keep hanging the mail on the iPhone. The major cause that can induce sync issues is the glitch in data transfer taking place in the backend and affecting the smooth working of the iPhone mail app.Reasons Why Gmail is Not Syncing with iPhone Syncing errors of Gmail with iPhone, also affect the overall speed and performance of the Mail app and thus re-syncing becomes necessary in such cases. When Gmail is not syncing with your iPhone, all the basic functions such as sending and receiving emails, open and read messages, accessing calendars and contacts would stop working.
