: There are usually two types of resets you can perform on electronic devices: a soft reset and a hard reset. A soft reset will restart the device without erasing any data, while a hard reset (or factory reset) will erase all data and restore the device to its original settings.
Russian forums like markx-club.ru host extensive discussions about NDDN-W57 troubleshooting, including service menu navigation and common fixes. nddn-w57 reset
How do I prevent the radio from locking up during my next battery change? : There are usually two types of resets