neutronscott I hear. It's funny because in back of the phone (by the battery), it says spd, but the phone is really mediatek.

    I got home from vacation and could open this phone up.

    Bad news is none of the test pads booted into brom when grounded. I don't have a magnifying glass to reliably probe the SMD components near the CPU.

    Good news is the phone still works after prodding it.

      • darthLevel 6 - Platinum Elite Member

        • Post #164
        • Edited

        neutronscott I have been trying and have the same results as you. I dont have much experience trying to short test points, which components near the CPU should I try shorting? I have a multimeter, is there anything specific I should look for? [Login to see the link] Also what have you been using as ground? I have been using point 1 in my pic.

          I have no experience with these as well but I have made a jtag in the past for routers and xbox.

          I only twisted 30awg wire to the radio shield above cpu and touched a bunch of stuff nearby. No dice. At first I used the battery ground pin. I think I found some emmc pins. I read you may end up with brom if its clk is grounded but it just delayed the preloader device from showing up.

          I am tempted to buy another and remove the eMMC and CPU to find jtag/debug pins. At the very least I should end up with a full rom dump.

          But next step I am trying to see if the USB port also works as TTL serial. I tried to tie to a raspberry pi clone board I had handy but I had wrong OS and the serial port was not available. I have old Nokia cables somewhere in the attic I will dig out next.

          Finally got to see the pic. All I've confirmed is

          1 gnd
          2 battery+
          7 usb vcc
          8,9 usb data

          Thought to cut the shield back as you did but didn't yet

          I left my phone on a bit and it downloaded an update over cellular. There went all 180MB of my data ha. I let it apply version KEEZ. Files are dated 2022-06-13. I've found nothing to have changed in the relevant sections.

          di2020 You mean files doesn't open, or there is no package installer? (Is TCL spying here)

              • darthLevel 6 - Platinum Elite Member

                • Post #170

                Biden2020prez It seems like they removed one of the Files apps. In the list of packages it doesn't have com.android.documentsui. Im assuming that is the package that used to be there (But I updated my phone so I cant see what used to be there...) Maybe there is a workaround through that app??

                    they may be watching this forum, it comes up in google searches

                    darth I wonder if it can be added back. Is it anywhere in /system/?

                    use webadb for filemanager

                        • darthLevel 6 - Platinum Elite Member

                          • Post #173

                          Biden2020prez Can you share the file location? adb shell pm list packages -f com.android.documentsui

                              in system > Product what is "remove_apk_file" ?

                              darth Don't have the phone on me, but I will.

                              (So I am assuming I shouldn't update?)

                                di2020 Deleted
                                The transfer you requested has been deleted.

                                  I have it in /system/priv-app/DocumentsUI

                                    Can someone extract that apk and post it here, I want to do a bit of reverse engineering and see if we can figure out why it was removed

                                      i only have updated phones but more are coming next week