Best VoIP Phone Adapters of 2026

"I found this to be the best single line ATA available. Although the setup was a bit tricky, following a tutorial made it manageable. Once configured, I’ve experienced great call quality, especially with VoIP.ms. I’m really happy that I upgraded from my previous device."

"After Obihai discontinued support, I chose the Grandstream HT801 with CallCentric. The setup was straightforward using their support page. I’m now enjoying reliable VOIP service at both my homes, and it integrates well with my Google Voice number for inbound calls. Overall, a great solution!"

"We wanted a landline for our kids and opted for this device with Voiply service at a low monthly cost. It took some networking knowledge to get it working initially, but now it works flawlessly. It’s a fantastic alternative to the expensive home phone services!"

"I’m using this for our office phone with VoIP.ms. Setting it up took a while due to one wrong setting and firmware updates, but once registered, it works well with no issues. It's bulletproof and a great value for an easy-to-use VoIP system."

"With 20 years of experience in VoIP products, I found the HT802 to be much more complicated than my previous devices. It offers a plethora of options that most users won't need. However, the concept of a self-contained SIP/VoIP box is great, and despite the initial difficulties, it now works excellently after tweaking the settings."

"I recently replaced two landlines with the Grandstream GS-HT802. I chose VOIP Much and VOIP.ms for my business needs. The setup was straightforward due to the specific instructions provided by the providers. So far, it works exactly as advertised, and the voice quality is much better than my old phone lines."

"I use this on my Polycom VoIP phone, and it works great—just like being hard-wired. I rarely experience any call drops, no more than when connected directly to the router."

"Setting this up was a breeze; it worked right away with my Polycom 450 VoIP phone. I’m very satisfied with the convenience it offers."

"Having this wireless option for our new Polycom desk phones is a game changer. The voice quality has been good, and though I had to restart the phone occasionally when it lost Wi-Fi, it's infrequent enough that it hasn't been a problem."

"This is an amazing product! After a quick setup, I had a dial tone on my phone in no time. The annual cost is remarkably low, around $25. I appreciate the convenience of using the app for calls and texts, although it sometimes doesn't ring on my Pixel 8 Pro as expected."

"Having used Skype for years, I decided to try MagicJack while living in Korea. I'm thrilled with how cheap and reliable it is, plus the fact that I can choose between using a real phone or my smartphone with the app. I’m considering canceling my Skype subscription soon."

"I had to replace my MagicJack after a few years, but it worked excellently on my FiOS. The call quality is crystal clear, and the app allows me to manage calls and texts on my iPad easily. However, since moving to rural America, my internet stability has affected its performance during the day. Despite that, it's still a great deal for home phone service!"

"I ordered six units, but they all came with European power supplies that don't fit North American outlets. Now I'm left with useless items until I buy new power supplies."

"Fortunately, I had a power supply from a previous installation, and it confirmed that the hardware works perfectly."

"I found the setup process easy and straightforward, especially through the Admin Portal. It works seamlessly with my Panasonic wireless phone system."

"I purchased this for my analog fax machine using a VoIP line. Although the software isn't very intuitive, it functions great once I figured out the configuration."

"I bought two ATA-191 MPP devices to replace my old Obihai ATAs. While many options overlapped, I found the ATA-191 had fewer configuration options which made it hard to debug. One ATA stopped booting soon after the return period, adding to my frustration."

"I find that it functions as expected even though it's from 2003! The user interface is dated, but it has all the essential features I need."

"This unit replaced the same model that lasted about 10 years. I'm experiencing some configuration issues, with two numbers switching between ports, but otherwise, it's working fine."

"I received only the power adapter, not the ATA 191 as expected. The listing is very misleading!"

"This is definitely a scam! The item is just the power supply, not the Cisco ATA device."

"I was looking for the complete ATA unit shown in the picture, but got just a power adapter instead. I'm returning it."

"I bought this unit as a substitute for my VIOP provider's hardware that didn't work with my fiber modem, and it works like a champ! The sound is crystal clear, and I experience no delay or lag at all. The LED lights are a bit bright, but I simply put a piece of masking tape over them to mute the brightness perfectly. The user interface for settings can be a bit confusing unless you have hard-core IT knowledge, but I’m happy this hardware works for me when other brands didn't."

"I had some concerns about whether the device was locked or unlocked, and it seemed the seller was unsure. However, it turned out to be unlocked and works just fine! The seller has been an excellent resource for this type of equipment."

"I used this power supply on another device needing a 5V, 2A supply. It fits perfectly! The plug dimensions are just right, and I appreciate the green LED indicator for power."

"This power supply does exactly what I need. The center positive design is a bonus for compatibility with my other products. Overall, it's a reliable choice."