How can I fix this gmail sync problem with my phone?

I had an HTC Desire for a while and it stopped syncing with my gmail out of the blue one day. I tried clearing the cache and data for google services, rebooting the phone, and even wiping all the data and re-signing in, but it kept giving me the same error message “sync is currently experiencing problems. It will be back shortly.” Well “be back shortly” turned out to be pretty meaningless, as it still wasn’t syncing my gmail or my contacts three weeks later. My Desire was over a year old, out of warranty, and had a charger input problem anyway, so I bought a new phone today: an HTC OneV. I set it up and signed into google, but it’s giving me the same problems and isn’t syncing my gmail or any of my contacts stored in google. I’ve tried all the troubleshooting tips I’ve found on the internet to no avail. I can sign into gmail on my computer just fine.

Any suggestions?