You cannot flash an RM-437 via a standard USB cable and Windows Explorer. You need specialized software and, for some methods, a hardware box.
A flash file, also known as firmware, is the phone's core operating system and boot data. For the RM-437, a complete official flash file package (like the "APAC v1.0" package) contains several specific components: nokia rm 437 flash file
typically found in European and Asian markets. It runs on the Symbian OS v9.2 platform with the S60 3rd Edition Feature Pack 1 user interface. Nokia E63-1 Type Number: RM-437 Common Firmware Version: 510.21.010 or 500.21.009 Operating System: Symbian OS v9.2 (S60 3rd Edition) Storage: 110 MB internal dynamic memory Required Tools for Flashing To successfully flash the Nokia RM-437 You cannot flash an RM-437 via a standard