If you have a Grandstream HT802 (like the Vonage unlocked ones) set to receive updates automatically, it would probaly have received an update to version 1.0.5.7 in the last couple of days.
And if you have the setting "Allow Incoming SIP Messages from SIP Proxy Only" turned on, it may fail to register with the VoIP provider after the firmware update.
At least that's what I noticed on 2 adapters with 3 different providers.
I will notify Gradnsteam's support about it.
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