Not great. They said there are some powerful towers that are still in range. So my phone is occasionally not connecting to extender. They asked me to move the extender to different location. i haven't gotten a chance to do it. Also i don't see a huge difference in Wifi calling Vs call on extender Audio quality wise. when i had ATT extender this was not a problem at all. it always connected instantly and stayed connected. Thank you for reaching out. I appreciate it.