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I happen to have an old phone laying around with messed up system partition(a couple of files accidentally deleted). This phone has an internal storage of max 1.5 GB(total 4gb, after setting everything up leaves me with 1.5 GB). I downloaded the stock firmware for the phone and the system.img size is almost 1.7GB I have twrp recovery. Is it possible to flash with an external sdcard. N.B: I unfortunately don't have my pc with me atm.

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  • It would help if you could tell us what phone (manufacturer, model) this is. Apart from that: no worries about the size, /system is not "internat storage" but a different partition – which is one reason why only 1.5G are "left" from the 4G announced (the remaining ~800M are on the other partitions, like recovery, cache etc).
    – Izzy
    Commented Sep 15, 2020 at 23:51
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    Yes you can flash from SD card. There must be some free space out of 1.7GB, so you can put it in an archive to reduce size. Or expose system partirion through UMS to a PC and flash image there. Or stream the image over network (using adb/nc) and write to partition at the same time. There are even more possibilities.
    – Irfan Latif
    Commented Sep 16, 2020 at 4:48
  • @Irfan Latif, hey, turns out I can only flash boot partition using twrp, guess I'll have to settle for the pc then. I also came across this that it can be done with dd command as well. Like dd if=/storage/sdcard/system.img of=I forgot the name from twrp terminal. is that possible
    – silly goose
    Commented Sep 16, 2020 at 6:51
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    See this answer to know how you find correct block device. The answer is about userdata partition. Replace that with system.
    – Irfan Latif
    Commented Sep 16, 2020 at 15:09
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    Yep! found it in /dev/block/platform/mtk-msdc.0/by-name/system I did a ls -l on system and found that it is a symbolic link to /dev/block/mmcblk0p20 Now, should I do dd if=/storage/sdcard0/system.img of=/dev/block/platform/mtk-msdc.0/by-name/system or should I do dd if=/storage/sdcard0/system.img of=/dev/block/mmcblk0p20 Which one should I do?
    – silly goose
    Commented Sep 16, 2020 at 21:12

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