I was previously using a Cisco SPA-112 with Google voice via the Simonics gateway.
Had a number of issues getting the device working, including manually upgrading the firmware to 5757. After a few forum posts, the device was working. Then it started rebooting itself every 3 minutes,
I performed another factory reset and now the phone ports are inop.
I have tried to call support (ha!), then I put in 2 service requests. After *hours* I got a response that my device was linked to GV now, but ignore the 2nd ticket. I replied to email, I created another request and no response in 3+ hours.
PLUS, I can't go back to the SPA, because the link to XMPP has been broken.
So far, I'm really unimpressed with Obihai. *Premium* support sucks.