Usually. You can check by putting your phone in and closing the door while looking at the signal strength meter. It should go without saying don’t turn the micr

Usually. You can check by putting your phone in and closing the door while looking at the signal strength meter. It should go without saying don’t turn the microwave oven on with your expensive electronics inside. If you get decent reception in the closed oven, you need a new one. Definitely works to kill reception forever if you power up the microwave for a couple of minutes…