porting firmware rom

Hello XDA, I have a phone without custom rom and stock rom, but a phone with exact the same specification just from another manufacter, and this phone have custom rom with a higher android version and my question is, it is possible to port this custom rom for my device? If yes how? Regards...

I've been trying to find someone interested in helping to update my Zenithink tablet (as mentioned in the title), to Androiod 4.1. I currently have 4.0 ICS, but it seems "glitchy" with program crashes not being uncommon. I've viewed similarly equipped devices running Jelly Bean that seem to run...