No, microwaves from a cell phone cannot damage another person's mobile phone even if they are in close proximity to each other. Cell phones emit radiofrequency (RF) waves, which are a type of non-ionizing electromagnetic radiation. These waves are relatively low in energy and do not have enough power to cause any significant damage to electronic devices like other mobile phones.
When two cell phones are in close proximity, their RF emissions might interact, but this interaction is not harmful or destructive. The most common interaction you might notice is interference, which can manifest as audio noise or temporary disruption of the signal. However, this interference is usually short-lived and does not cause permanent damage to the devices.
Cell phones are designed to meet strict safety standards, and their RF emissions are regulated to ensure they do not pose any harm to users or other electronic devices. As a result, there is no need to worry about one cell phone causing damage to another simply by being in close proximity.
It's worth noting that while cell phone RF emissions are generally considered safe, it's still a good idea to use cell phones responsibly and maintain some distance from your head and body during prolonged calls, as a precautionary measure. The scientific consensus is that the RF energy from cell phones is unlikely to cause harm at normal exposure levels, but minimizing close and prolonged contact with the device is a sensible approach.