Iphone unknown error 1 (unknown error 1) and Network error

Friends, I used a fine-tipped knife, needle and nail to open the phone. You don’t need to go to the phone store for nothing, you can do it yourself. I read in many sources, “Searching for network” or if it gives an error during software installation, there is a Baseband error and the phone is garbage, I decided to do it myself when I researched foreign sources, which I already took to 3-4 phone shops, they could not do it. Good luck with .. .