I tried root, cwm, triangle and custom rom for N7100 on my N7105. All works except for custom N7100 rom. Custom rom from N7100 if installed onto an N7105 will mess with the modem (no phone, message, data transfers but wifi still works). But flashing back N7105 modem unto a N7100 custom rom installed on an N7105 does not bring back use of modem.
I briefly mentioned this in another, related thread. However, considering how unique and specific this is, I thought it best to create a thread dedicated to it. Furthermore, I am fully aware of just how counterintuitive this is.