18 Apr
2014
18 Apr
'14
2:08 p.m.
Compare the INVITEs to see what differs between the clients. Might hint at why the behaviour differs. Are you sure they're using 3G not Wifi in all cases? If they're on Wifi the NAT behaviour there could be different. Are you sure the NDLB option is in effect? You can also try the rport one.