So location matters. Virgin Mobile does not have towers but is a MVNO (see google if you want to know more?) and as such may not have any access to tower traffic data.
Sounds like tower congestion to me. More at https://www.google.com/search?hl=en&as_q=cellular+tower+congestion+all+circuits+are+busy&as_epq=&as_oq=&as_eq=&as_nlo=&as_nhi=&lr=&cr=&as_qdr=all&as_sitesearch=www.howardforums.com&as_occt=any&safe=images&tbs=&as_filetype=&as_rights=
Pretty well discussed and not easy for folk that want it to just work.
To all the tech-savvy guys & gals on the form, here's a pickle:
How is this possible, and how do I fix it? I've called my cell provider twice, and both times they've proven that there is no issue with my phone.
Phone #1 - My cell phone, Virgin Mobile
Phone #2 - My friend's phone, Verizon Wireless
Phone #3 - My home phone, Verizon Fios
Phone #1 can call Phone #2 & phone #3 with no problem.
Phone #2 can call Phone #3 with no problem
Phone #3 can call Phone #2 with no problem
Phone #2 gets a "all circuits are busy" message when calling Phone #1
Phone #3 gets a fast busy signal when calling Phone #1
In Addition, 2 different Virgin Mobile customer service reps called Phone #1 from their office and got through both times on the first try.
My friend's mother (AT&T wireless) called Phone #1 and got through on the first try.
My sister (Verizon Wireless) sent Phone #1 a text, and it came through immediately.
WTH IS GOING ON????? How do you begin troubleshooting something like this?
All guesses welcome, because I'm out of guesses.