I gave my Phone (Celkon A95) into a service centre because of touch malfunctioning before it I backed up the user data by pressing Power and Vol+ buttons, it gave me a backup file called userdata20130902_131223.backup. After a few days I got my phone back and when I restored the data it gave me "Checksum Error". I'm unable to restore my previous data. Is there any way get back at least messages and contacts?
Sorry for my bad english.
It's a 512 byte header in front of a "tar.gz"
hexdump -C userdata_xxxxxxxx_yyyyyy.backup | less
showed the magical zip header "1f8b0800 00000000" at offset 0x200 So, skipping 512 bytes, the rest can be gunzip | tar
dd if=userdata_xxxxxxxx_yyyyyy.backup bs=512 skip=1 | gunzip -c | tar xv
In the /data/ directory, hunt down the db file. It's a sqlite3 database file which you can view with a variety of tools, e.g. sqlitebrowser
Stock Android recovery backup files can be restored with a Nandroid custom recovery, if you simply repack them into tar archive.
i put this two command lines in a dirty shell script (extract + repack as tar). thanks to ektoric figuring out his gunzip method!
the shell script will convert your backup file into nandroid backup automatically. download >bckp2cwm.zip< at
From http://forum.xda-developers.com/showthread.php?p=65374561#post65374561
