i have neo cam NIP 03 clone (i think so, mine has h.264 decoder also). 
  
my network is like this camera :- 
  
3G USB > TL MR-3020 wifi router > IP cam (wifi) 
  
and for PC :- 
  
3G USB > TL MR-3020 wifi router > PC (LAN cable) 
  
without 3G connection (i.e. internet) , i can access my cam on PC (i.e. on LAN) 
  
but when i connect USB router (TP LINK _ MR3020) to my router and 
connect router to internet , camera instantly drops connectivity with 
wifi router. so it can not be accessed via local PC or via remotely. 
  
don’t know the problem, but due to this problem, i can not access it remotely  
  
i have done port forwarding OK AFAIK (its 8888)