This used to be great to have as a backup line, but now, I can't send any text or make any calls. I still receive texts, which is odd, but can't make calls which is primarily why I have it. I tried on a different phone, with the same result. Nothing has changed on the old phone on which I have been using it for years via wifi-only. It's a Samsung Galaxy S3 SPH-L710 with android 4.4.2, and talkatone worked fine on it about 3 weeks ago, but now does not make calls or send texts at all. I try to make a call, but the dialing screen doesn't even come up, it just immediately adds an entry into the call log with 0 seconds of call time. I tried it on another one of my phones, just to see if it would work, and had the same result. I have tried all the usual troubleshooting options (clearing cache, uninstall/reinstall, etc.), cetificate is fine. Another similar program works fine on this phone, so I've isolated it to being a talkatone problem, not a problem with my phone or setup. I hope they get it fixed very soon, this is the first time I've really had a problem, but it's been ongoing for days now. At least 3 - 4 days.