I know people, who microwave their phones for a few secs to get them replaced by the carrier with a newer model, still not sure if you're joking or not.
Solder melts at >180°C. This idea that putting electronics in an oven will reflow internal components is a commonly repeated meme[1].
In reality, putting electronics in an oven usually has the effect of heating up some chips which are heat-sensitive and might temporarily give them new life.
It _is_ only a temporary fix, though.