I have had my Dinc2 for one week now and I've experienced this issue with my gmail. I was lucky enough to get my email setup though...now I'm just not receiving any messages. And when I try to update the settings (such as update my password), all I get is error messages. I can't even delete the account...either says 'cannot connect to server' or simply 'null'. When I called customer service they had me do the usual (battery pulls, factory resets, etc.)...it seems like the factory reset fixed the problem and I had no issues over the weekend. But today I haven't received one gmail message on my phone.
I'd say this is a problem with the mail app on the phone (I am receiving the messages using the Gmail app), but all my other accounts (syncs with 3 other emails) are working perfectly. I don't really want to use a second email app because I like having everything together...but you would think gmail would work okay on a google phone.
Any other fixes? Or is it time to return the phone?