i did never get "SIM registration failed" error.
and how to do this: "dmesg | grep ssi"
my n900 runs only pr 1.1.1 and pr versions before that.
how do you mean to flash pr 1.3 do you meant like this:
1. flash pr 1.3 while pr 1.1.1 is allredy flashed and working.
2. and then flash only nolo from pr 1.3 image ???

and what should i do with sim problem any advice what should i do ?