One common issue many users run into is that someone else has already used their phone number. More often than not this is because the previous user because the previous owner of the phone number didn't delete their Life360 account. That's ok though because Life360 makes it really simple to claim your phone number and set up a new account. You'll need to visit this web page and input your number. Life360 will then send you a verification code via text message to confirm your identity. Once verified, you can create your own account using your phone number.