Riporto dal link della guida di Val3rio a questo link che ti ha postato Guida Val3rio:
su # E' richiesto il root
filename=/system/build.prop
JPxFP="ro.build.fingerprint=samsung/GT-I9000/GT-I9000/GT-I9000:2.2/FROYO/RSJP5:user/release-keys"
rm -r /data/data/com.android.vending*/* /dbdata/databases/com.android.vending/*
sed 's_ro.build.fingerprint=.*_'${JPxFP}'_' $filename > /tmp/build.fix.prop
busybox mount -o remount,rw /system
cat /tmp/build.fix.prop > $filename
chmod 644 $filename; chown 0:0 $filename
busybox mount -o remount,ro /system
exit
exit