Does a new radio file and baseband upgrade help my signal strength? I have a Verizon Gnex and am having serious problems keeping my 4G! It is nonstop switching between 3 and 4G?
Yes radios can have an overall effect on your signal strength/quality. It is also to be noted that just because there is a new radio on the list doesn't mean its the best. Some people have better luck in their area with an older radio and some a newer... Its more trial and error than anything and isn't a real big deal to swap out if your already unlocked and rooted which is needed to change radios at will.
Check the thread below, Advisor zero neck has laid out some good instructions and details on updating your radios.