I have Uverse and have had it for around 7 months. I have the 12mb down / 1.5mb up package. I have Uverse TV and also Uverse Voice. The Uverse Voice has been perfect and never had any issues. The only problem is the price is just under $40/month. So I signed up for 1 year service with Voipo last week and received my Linksys PAP2T device (which I have never liked Linksys because of too many DOA devices and devices that fail.
I hooked up the Linksys device on Saturday when I received it in the mail. I was able to get a dial tone and made several test calls. Setup my AT&T Uverse voice to forward calls to my temporary Voipo number until it gets ported.
Sunday night my wife said she heard touch tones randomly when she was talking to her sister for 18 min.
Then today I called my wife from my cell phone and it sounded fine the entire call.
But tonight she tried to call her Grandma and the ringing sounded horrible and robotic. Then her grandma answered and she couldn't hear anything she was saying. She tried 3 times and it was horrible everytime. So then she used her cell phone to call and started complaining about why she hates internet telephone. After she got on her cell phone I started making a bunch of calls to my automated banking system and all of the calls I made were horrible. I unplugged and replugged in the ATA. No change. I reset my Uverse residential gateway (2wire) and still not any better. Tried restarting the ATA again and it still did it. Tried recording some calls using *28 and every one of those sounded horrible. The recordings all came to my email but were all 260k and none of them would play in Windows Media Player. Voicemails play fine in Windows Media Player.
So after 1/2 hour of playing around I made another call to my bank and it worked fine. So I took the phone to my wife and said can you hang up with your cell and try calling her again. After she hung up she said it was fine.
I just don't want this to be an ongoing thing after I have my number ported over and miss my 30day guarantee.
My internet speeds are fine and my skype app on my iPhone works fine over my Uverse wifi always. Never have any problems. I was thinking about buying a Skype wifi phone and getting a powerful wifi antenna to cover the whole house but decided to get Voipo.
Any help with settings on my Uverse gateway would be great. Do you think my Linksys ATA is defective?

Thanks
Brad