Grandstream WP820 Wireless Wi-Fi Phone

Been using this phone on its second day and it seems it works better with 2.4Ghz WiFi frequency. There’s little to no interefence and you can walk around with it. I haven’t tested carrying it for long since I work from home. Although it’s very convenient if you need to grab or do some stuff around the house with it. Plus it has a 3.5mm audio jack so you can just press the PTT button (I set it to mute button) if need be.As for the interface, it looks like a very basic cordless phone. Nothing fancy. Nothing bad with it. You can adjust the settings directly to the phone or use the web GUI.As for the lines. Yes, it can connect up to two lines only with transfer, hold, mute functionalities. You can switch between lines if you need to call with either accounts. You just need to press the Accounts soft key for this. It also has an alarm and calculator which is handy sometimes.The look and feel seems better than a China phone to be honest. I’ve seen a lot of China phones and I have no issues with its design. It’s a very basic phone like one of those Nokia 5210 models but taller.This is my first Grandstream phone and I’m fine with it. If you can’t carry a DECT phone or a deskphone for travel, I’d highly recommend this. I don’t see any other WiFi phone as cheap as this but still provide comparable voice quality. Cheers.

I have had this system, the UCM6204 for about 3 months and the system in general is good and has a lot of features. This cordless wi-fi phone however, does not work properly. It has a problem receiving calls although everything is set up properly. It will work ok for 3 days and then it will just stop working. I will reconfigure it and it will work for a few days again and then stop working. Ring groups do not work properly only with this phone. I would not recommend it.

Good voice quality. Reliable connection to my Samsung 3-node mesh WiFi in our large house. Even my wife likes the user interface. Took less than an hour to connect to my Grandstream UCM6102 VoIP PBX. Phone book (contacts) is functionally fairly robust but a bit awkward to use. Saving a caller ID as a contact saves the full ID as the first name and saves the caller ID number as Work Number. Gotta edit the contact to get it the way you want. Contact import file format not documented, so it's difficult to transfer phone book from other phone systems. Lots of ringtones, but most are funky; wish I could download my own ringtone. Web interface is decent. Don't yet understand paging and push-to-talk. Expensive when compared to DECT technology.

This does work with Vertical Wave.. just update the WP820 firmware to the latest version from Grandstream's site, then in the phone config, be sure to DISABLE "Support SIP Instance ID" and it will work as expected. If you leave this enabled, the phone will lose its registration with Wave within a few seconds of receiving an inbound call.Also if you aren't using any video features, go through the phone's setting and disable the video calling settings, otherwise it will prompt you each time you place a call if you want the call to be an audio call or a video call.Overall a good value Wi-Fi SIP phone.

The phone is a bit overpriced for the build quality, but the feature-set provides good value. The standard codecs are included, it supports wifi including cert-based authentication and encryption, color screen and instant messaging, pager capability and button mapping, and Bluetooth and speakerphone. Why I dropped a star for this product is because it doesn't support OpenVPN multifactor, or OpenVPN with cert authentication, which for my use case, limits my ability to use this phone remotely. This, it will remain a desktop phone until they release a patch.

Bought two of these to try out and while they were easy to setup and seemed to work well, they are buggy. We set the admin password for the device using the web interface and we used a special character in the password. Out of nowhere, one of the devices stopped connecting to the wifi and since we hid all the admin settings on the handset to prevent end users from accessing it, we had to do a factory reset to fix it. Problem is, there was no key that allowed us to enter a special character from the keypad. Support suggested a few, none worked. This might be specific to the firmware we had on it at the time, but within 2 weeks of using it, it lost all settings and could not be recovered. Returned.

A unique product that I’m impressed with. Can’t speak to other reviewers comments about grand steam. It doesn’t O’Leary’s comment we’ll to the access point and isn’t that Smart about handover but it works and I couldn’t find alternatives.A bit of VOIP quality issues but I don’t blame the handset. I think that’s the ISP and my VOIP provider.Huge number of features and configuration including web set up and addrsss book import. Impressive.I’d buy again.