How to downgrade a S35 SVN20 to SVN18? Anyone coped this problem already? I do not wish to use the destroy / repair solution...
Thanks for your reply.<br />Best regards, Lead.
I don't have a S35 to hand, but here's something you could try:
1) Backup the phone<br />2) Overwrite it with V16, write a map, turn in on and off again, then dump it.<br />3) Upgrade to V20, dump it again.<br />4) Look for differences in the EEPROM contents, and find out which one (or ones) causes the old FW to die.<br />5) Downgrade the phone using SWUP<br />6) Restore the original EEPROM<br />7) Patch the blocks that are killing the phone.
If it's any use, I have a program that will search through a pair of flash files, and will point out the EEPROM blocks that have been altered or deleted.
This is the result you get when upgrading a C35i from V16 to V18:
Block data changed [5002]:<br />New: fc 00 0040 00ff404c 138a 00 fc<br />00ff404c 00 00 d0 00 01 00 00 00 00 00 d1 00 01 00 00 00 ..P.......Q.....<br />00ff405c 00 60 ff 00 04 00 00 00 00 40 ff 00 04 00 00 00 .`.......@......<br />00ff406c 00 a0 ff 00 02 00 00 00 ff ff ff ff ff ff ff ff . ..............<br />00ff407c ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................<br />Old: fc 00 0040 00ff5cb0 138a 00 fc<br />00ff5cb0 00 00 d0 00 01 00 00 00 00 00 d1 00 01 00 00 00 ..P.......Q.....<br />00ff5cc0 00 60 ff 00 03 00 00 00 00 40 ff 00 03 00 00 00 .`.......@......<br />00ff5cd0 00 a0 ff 00 02 00 00 00 ff ff ff ff ff ff ff ff . ..............<br />00ff5ce0 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................<br />Block data changed [5011]:<br />New: fc 00 000c 00ff4a16 1393 00 fc<br />00ff4a16 03 03 00 00 ff ff ff ff ff ff ff ff ............<br />Old: fc 00 000c 00ffab60 1393 00 fc<br />00ffab60 d2 02 00 00 ff ff ff ff ff ff ff ff R...........<br />Block data changed [5093]:<br />New: fc 00 001c 00ff4a50 13e5 00 fc<br />00ff4a50 e2 00 b3 00 90 00 75 00 5f 00 56 00 20 00 ff ff b.3...u._.V. ...<br />00ff4a60 ff ff ff ff ff ff ff ff ff ff ff ff ............<br />Old: fc 00 001c 00ffab98 13e5 00 fc<br />00ffab98 d7 00 b3 00 90 00 75 00 5f 00 56 00 26 00 ff ff W.3...u._.V.&...<br />00ffaba8 ff ff ff ff ff ff ff ff ff ff ff ff ............<br />Block data changed [5025]:<br />New: fc 00 0014 00ff4a6c 13a1 00 fc<br />00ff4a6c ee ff ff ff ff ff fe ff fe ff fe ff ff ff ff ff n.....~.~.~.....<br />00ff4a7c ff ff ff ff ....<br />Old: fc 00 0014 00ffabb4 13a1 00 fc<br />00ffabb4 f0 ff ff ff ff ff fe ff fe ff fe ff ff ff ff ff p.....~.~.~.....<br />00ffabc4 ff ff ff ff ....<br />Added block [5131]:<br />New: fc 00 0004 00ff6c58 140b 00 fc<br />00ff6c58 ff ff ff ff ....
If you want a copy, let me know.
Regards,
Pete
[ 19 February 2002: Message edited by: TriMesh ]</p>