Hello. I switched my internet to ZONG MBB Fiberhome to improve downloading of games. But it cannot sign in to Playstation Network. It signs me in sometimes with NAT 3 but does not sign in the other times. I googled it and found out that I am not the only one. Zong MBB has a known issue with it. So, is there a solution for this? Or I have just wasted my money? 
