Weird phone calls, possible pranks? Not sure what to do
This may be totally irrelevant to the thread, not sure where else to put it.
It started on 3/11/14, I got a phone call from an 813-408-???? number. A boston sounding man pretending to be from a local pizza joint, saying I ordered 3 pizzas and my card I gave was declined and needed a new card. I figured it was a scam to take my info because I (and no one in my household) had ever ordered from this place). The man sounded scripted, pre-recorded or perhaps a mobile app just messing with me. Anytime I spoke, his speaking stopped and it/he wouldn't answer me when I spoke. I hung up, after a few minutes, I called back. I didn't get an answer both times I called back, just a man's voicemail for his home business.
Later, I got a call from another 813-408-???? number, but different from the first. It was a man claiming I was messaging his girlfriend on Facebook. His responses also sounded scripted or like recordings from an app. I assumed it was another prank, so I said little and hungup. I immediately called the number back and the man sounded confused and swore he didn't call me.
I thought these calls were weird because my number is also an 813-408-????.
Later in the same day, I was playing xbox with a friend of mine. My phone rang from his number, but he swore he wasn't calling me. Just after that, his phone rang from my number, but my phone wasn't calling him.
The next day, 03/12/14, I got a call from the same friend. The phone showed his name and correct number (i have it memorized). I answered and it was a female voice, claiming I was talking to her boyfriend on Facebook. Her voice ALSO seeming scripted or recorded. My buddy wasn't even near his phone, he was playing softball and swore he wasn't doing anything.
Not sure what I need to do to get this to stop. Don't know if changing my number will help or not and would prefer not to do that.
If it matters: I am running Cyanogenmod 11, up-to-date nightly's. I've been on Cyanogenmod as long as it's been available for the Nexus 5. It's a black 16GB US model and i'm on AT&T. I've never had anything like this happen before.
I got a weird call from an unknown number from a recording or app. A second weird call from a different number comes in, same weird recording conversation and scripting. Illegitimate calls to and from my phone occur. Illegitimate call from a friend's phone that he didn't send. I have no problem sending or receiving calls or texts, nothing else seems to be off. I'm on CM11 3/12/14 nightly.