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.

Avoid Grandstream if you can help it. We only bought this because only "certain" phones work with Vonage. To keep our business number we had to use Vonage when we moved our offices. The instructions were wrong for the phone. The places it was telling me to go didn't exist on the phone. I tried to call the company and they don't offer support over the phone unless you sell the products. I couldn't even get a human on the phone. I kept getting transferred to voicemails. So I had to register with Grandstream and submit a "ticket" and wait. Avoid the whole company

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.

It's not bad at all for a wifi based VOIP phone.setup is all via a GUI, and it is relatively straightforward.. Took only 2 or 3 minutes to connect with a FreePBX (asterisk) VOIP box, and it worked.audio quality is....well, it's Grandstream.. Not entirely sh**t... but not far from it. Of course that's the Grandstream we've come to know and love, right?the biggest complaint I have is the ergonomics of the buttons.. it's really got the typical cheap Chinese tech feel - buttons are sloppy, plastic is thin, etc..Most of the time you have press the buttons hard (or harder than you should need to), and almost every call, i find that i've miss-dialed a number or two because of it. I've configured dozens of Polycom Kirk systems (now called Spectralink), and the quality difference is night & day... a 10 year old Kirk phone sounds night & day better than the Grandstream, and the feel is well, professional vs bush-league...if i could convince VOIP clients to put up with the Spectralink handsets' "old" GUI, i'd never place these in... but it is cheap, fast, and quasi reliable...

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.

Nice phone BUT not compatible with Ooma Telo Air 2.

Purchased 2 phones September 2019. Configured by Carolina Business Phones, North Charleston SC. Both phones pre-configured by carrier. One phone had to be returned because charging wire DOA. Phone worked perfectly. Return process was swift. I then purchased two more phones. I use them at home with a detached office. Push button "walkie talkie" feature is a blessing. Love the clarity and volume. Android OS on phone and color screen. Long press on a key pops up a menu for special keys like *&^%$#@ handy for Wi-Fi passwords. This is an excellent phone but make sure your phone service can support the phone as it is new technology.