[Android Central Question]

Why does it say used Verizon voicemail on my Google activity when AT&T is my phone carrier

[B. Diddy]

Welcome to Android Central! Is your phone originally from Verizon? If so, it presumably still has all of Verizon's preinstalled apps, including their voicemail app. Even if you're not using it, it might occasionally ping the web, which would show up in your Google activity.

[davidalanreece]

Solved: After talking to a live Google assistant on their help desk, Leslie checked my phone model and found that it is a Verizon model. So what is happening. Retailers buy their phones in lots, and each lot is configured by one of the major phone companies. Using Walmart as the example, they have purchased phones from both Verizon and AT&T, but they are able to unlock either of them for either cell company. So when you buy the phone and you have an AT&T account, they might grab a Verizon configured phone. When they set up the phone as new, however, your phone company will install their software, but some of the very low-level software won't change. Hence, even though you are using an AT&T phone service, the phone itself still might be using the originally installed software to do the actual work in spite of the phone screen showing you otherwise. You can prove it to yourself (which I did), by calling your AT&T voicemail. Then wait a few minutes and check your activity. You will see that every single time you do so, it will show used "Verizon Voicemail." Hope that helps.