As someone who frequently receives unwanted calls, I was interested in this Panasonic KX-TGD813B cordless phone because it has a built-in call blocking feature. I bought this product because I wanted a reliable cordless phone for my home office that could help me to reduce time waste for all these spam and fraud calls I have been getting lately.My first impression of the phone was positive, as it has a sleek black design that looks great on my office desk. The handsets feel comfortable to hold and the buttons are large and easy to press. The display on a headset is large and easy to read, probably it's the largest display I've seen on such phones. The setup process is easy and quick, just plug it into your phone line and that's it, nothing really to set up. The phone's interface is user-friendly, and I was able to access its features without any difficulty.Now, the most interesting and important to me is the call block feature, which works flawlessly, allowing me to easily block unwanted calls from telemarketers and scammers. I was able to easily add numbers to the blocked calls list, and the phone also has a one-ring scam alert that warns me of potential fraud calls. The sound quality of the phone is good, and the ability to use the handsets as intercoms is convenient. The phone also has a useful feature that allows me to locate a misplaced handset by pressing a button on the base unit. And it also includes an intercom feature that allows me to use two headsets as walkie-talkies. The only minor issue I found is that the battery life could be better.If you did not know, the one-ring scam, also known as "Wangiri" scam, is a type of phone fraud that is becoming increasingly common. In this scam, fraudsters use an automated dialing system to call random phone numbers, let the phone ring only once, and then hang up. The idea behind the one-ring scam is to trick people into calling back the missed call number, which is usually a premium-rate number that charges a high fee per minute. When the victim calls back, they are put on hold for an extended period, racking up a large bill without realizing it. This Panasonic phone really helps to avoid such sort of scams.Overall, I think the Panasonic KX-TGD813B is a versatile and reliable cordless phone that offers a range of features that can be useful for home or office use. While the battery life could be better, the phone's other features more than make up for it. The call blocking feature makes it a particularly useful phone for anyone looking to avoid unwanted calls. Unfortunately, it does not include more advanced functions like Link2Cell, Bluetooth, 2-way recording, and an answering machine that you can find in more expensive Panasonic phone models.  *** TL;DR ***Yes, I would tentatively recommend the Panasonic KX-TGD813B for those who want a versatile yet simple cordless phone with features such as call block, intercom, one-ring scam alert, and handset locator. While the battery life could be better, the phone's other features are useful and functional. However, this phone is missing 2-way recording, Bluetooth, Link2Cell, and an answering machine functionality, which makes it not that useful for office use. I'm on the verge of a 3-stars and 4-stars rating and I will leave it to you to decide if this phone is for you or not. Still, because it's Panasonic and the quality of headsets are superb, my rating is 4 stars.+++ Pros +++1) Slick design, looks good in any office or home.2) Very effective fraud call blocking.3) Protection from one-ring scams.4) Has an intercom feature.5) Has a handset locator feature.6) Easy setup process.--- Cons ---1) No answering machine function.2) Missing Link2Cell Bluetooth.3) Missing 2-way call recording.4) Battery life could be better.