Dear friends, First of all I apologize if it is not the right place I have a smartphone made Chine, down slot battery I read this ID model : A3QR. Before making any changes, I performed all this steps : I Bkuped this partition dev: size erasesize name mtd0: 00020000 00020000 "preloader" mtd1: 00300000 00020000 "nvram" mtd2: 00020000 00020000 "seccnfg" mtd3: 00060000 00020000 "uboot" mtd4: 00400000 00020000 "boot" mtd5: 00400000 00020000 "recovery" mtd6: 00120000 00020000 "secstatic" mtd7: 00060000 00020000 "misc" mtd8: 0a000000 00020000 "system" mtd9: 03c00000 00020000 "cache" mtd10: 00300000 00020000 "logo" mtd11: 000a0000 00020000 "expdb" mtd12: 11340000 00020000 "userdata" with this commands dd if=/dev/block/mtd0 of=/mnt/sdcard/preloader.bin ... etc... How I can reconstruct the whole packet update.zip from these images of bkup ? From the site http://forum.china-iphone.ru, I followed some posts and I tested they, unfortunately does not work from the model phone A3QR : The smartphone have two slot for sim card, TV, radio, GPS and a sensor for movements. My proble is that I rewrited the partition /dev/block/mtd.. booting.img, in an attempt to load a kernel compiled by me. Now the phone when I turn it on, remains fixed on the classical image, the word Android reversed. Surfing in the forum, I found this package, Android_2.2.1_for_K8181.rar and I unzipped and take the file update.zip from the folder 10HX5_WVGA_ANDROID2.2, after, I copied the archive update.zip to the root of the sdcard, I turned off the phone. I turned again the phone to on, pushing the power button + volume+ for 5 second, I entered in the menu, bootloader : I selected the option apply sdcard:updata.zip All ok the process is terminated with the words -- Install from sdcard.. . Installing update... Install from sdcard complete. When I reboot the phone, after that the process booting was loaded the word android, the screen had a white color and shaking, after some seconds the phone reboot alone, and again entered into the menu recovery. If someone from this forum, could help me to fix this problems, I would be grateful. Sincerely, Eugenio.