Some guys say that they have differences about the signal and the battery life, i think that it is a balance, the greater signal strength will be lower the battery life, but some updates can make better use of the resourses, honestly i tested several roms and basebands but for a short time then i dont know exactly but i read that the .36 is the best balance.
Now i have a doubt, can the alteration of de baseband harm the gps module?