am having this issue on my 9630, when i ignore any call i cannot make any outgoing call after it, all i get is Cannot connect, call in progress !!!
currently am running the hybrid 220.127.116.11, i also ran the leacked 18.104.22.168 booth with the same issue!!
when running the 4.7 the issue isn't present!!
but i need the V5 OS as i need Arabic writing support which i found a solution for it only on v5..
i did all types of OS installation, even wiped the device clean
am running on the verizon tour, but i live in Bahrain..
appreciate any possible help