http://go7cnxivpns4x2trczyaabxwnrz7bwlxjiverkc32o4mjd5npjukpqid.onion/blog/2020-12-03-rescuing-n900.html
                                
                                
                                                                            So I uploaded the converted initrd image, updated the boot script, booted the
phone and SUCCESS!!! It worked! Now I just needed to quickly type "chargebat"
command and my phone was rescued. After this long adventure I looked again at the "u-boot-update-bootmenu" script
and found that it already contains commands to convert kernel and initrd, but
somehow I skipped them (facepalm).