Mine

#!/bin/sh                                                                                                                
REVISION=`cat /etc/fon_revision`                                                                                         
VERSION=`cat /etc/fon_version`                                                                                           
                                                                                                                         
#if [ $REVISION -gt 2 ] || [ $VERSION != "0.7.0" ]                                                                       
#then                                                                                                                    
echo "Upgrading FON firmware and rebooting..."                                                                           
echo "This may take up to 10 minutes. Please be patient."                                                                
echo "It's not necessary to reboot the router; just wait until you can reach the router again."                          
                                                                                                                         
echo "Flashing image..."                                                                                                 
mtd -e image -r write full_image image > /dev/null 2> /dev/null                                                          
rm full_image                                                                                                            
                                                                                                                         
(sleep 4; reboot)                                                                                                        
return 0                                                                                                                 
#else                                                                                                                    
#echo "Sorry, your firmware needs to be remotely upgraded first."                                                        
#echo "In order to do so, connect it to the Internet and wait for a few minutes,"                                        
#echo "then check that the version is newer than 0.7.0 r2 on the Status Page"                                            
#return 1                                                                                                                
#fi