Firmware 1.0.9.3 broke Grandstream HT802V2 connection to VOIP.MS

General
1

The Grandstream HT802V2 works well on VOIP.MS. I had two on firmware 1.0.5.4.

I updated one of those to firmware 1.0.9.3, which has apparently made it unable to register with VOIP.MS. Rebooting didn’t help, a factory reset didn’t help, and trying different VOIP.MS servers didn’t help. I made sure that none of the settings contains a typo or stray space.

I opened two browser windows and put an HT802V2 in each: one with 1.0.5.4 (which worked) and one with 1.0.9.3 (which didn’t). Then I compared all of the settings side by side: they’re identical (except for the subaccount name). I swapped the two subaccounts between the two devices, and again 1.0.5.4 worked and 1.0.9.3 didn’t.

I’d be happy to revert 1.0.9.3 to 1.0.5.4, but Grandstream’s firmware instructions say “Once HT801 V2/HT802 V2/HT812 V2/HT814 V2/HT818 V2 is upgraded to firmware 1.0.9.3 or later, downgrading to 1.0.7.5 or earlier is not supported due to CPU frequency adjustments.“

I did upgrade 1.0.9.3 to beta firmware 1.0.9.4. That made no difference, so I reverted it to 1.0.9.3.

Do you have any advice?

Have you had trouble with firmware 1.0.9.3 at VOIP.MS?

2

Did you try a full factory reset on the HT802V2? I had a similar issue with a different Grandstream device, and I tried a million different things to fix it. Nothing worked until I finally did a complete factory reset, and that ended up solving everything. I figured I would mention it in case it helps here too.