DG900 Boot loop

[deanlee121]

I am sure you will find the way to fix it and show us all how you did it one day good luck bro

[leesnose]

Cheers Deanlee, I hope so.

I would appreciate it if anyone has advice on what to do if the internal storage is corrupted, sometimes the error message tells me that the SD is damaged. In both cases it asks me if I want to format but does nothing when I say yes.

I tried doing it via the adb console thingy in mtktools but it cannot see the internal memory because I guess it is not mounted (if I try mounting it in the storage settings it just gives me the damaged sd/corrupted internal storage message).

[deanlee121]

Cheers Deanlee, I hope so.

I would appreciate it if anyone has advice on what to do if the internal storage is corrupted, sometimes the error message tells me that the SD is damaged. In both cases it asks me if I want to format but does nothing when I say yes.

I tried doing it via the adb console thingy in mtktools but it cannot see the internal memory because I guess it is not mounted (if I try mounting it in the storage settings it just gives me the damaged sd/corrupted internal storage message).

you try format on sp flash tool then new ROM ?

[leesnose]

I haven't got a ROM sadly. I have followed Sniper47's directions to backup my ROM but it was after I had already mucked things up.

I have experimented reflashing this ROM, it does not ruin anything but nothing is solved either.

I was a bit nervous about investigating the format+download option on SP flash tools because it checks all of the boxes & I do not think that I have any files to go in the PRELOADER option.

[deanlee121]

Pull out the the battery of your phone, wait for about 30 seconds and reinsert it to its place.
Boot your device into ASR (Android System Recovery) mode. The method involves a hardware key combination and varies from one phone to another. For Samsung phones, for example, the key combination is Volume Up+ Home + Power keys. The tablets which generally have no Home button, you can enter the Recovery mode by pressing and holding the Volume Up + Power keys simultaneously.
In the Android System Recovery, scroll down to “wipe cache partition”. option using the volume rockers and select it using the power key.
When you have wiped the data/factory, go back to the main menu and reboot the device by “reboot system now” option.
If the device is still stuck on Bootanimation pull out the battery again and repeat the above steps. This time also “wipe data/factory reset” and then reboot device

The bootloop problem should be fixed


Got that from a site lol

[leesnose]

Cheers for looking Deanlee but part of the problem is that I cannot get into recovery mode.

The situation has changed again in that I stopped being an idiot & actually noticed the format tab on SP flash tools & that it had an option to format everything except the preloader.

I did the format & flashed with what backup I had & now I am in a more traditional bootloop - ie. when I try to turn it on it just repeatedly shows the doogee screen & then restarts.

This might actually count as progress where it is at least possible to turn it off with the power button, before that it used to just make the screen flash black & grey.

The other issue I did not mention is that the battery is built in so there is no way to remove it.

The issue now is to try & clear those caches & do a factory reset without being able to enter recovery mode.

[leesnose]

Okay, one problem solved & a worse one created.

Just in case anyone was suspecting that I might not be an idiot, I will prove them wrong.

The stock ROM has been released & flashing it with SP tools solved my problems & gave me a working phone. It was now telling me that my IMEI was invalid but not a big problem because I did not steal the phone & I still have the box.

I rooted the phone & then changed the two IMEIs using MTK tools but after restarting I got the message:

"UID's on the system are inconsistent. you need to wipe your data partition or your device will be unstable"

A quick google told me that a factory reset from recovery normally solves this so I used MTK tools to create & flash CWM from the stock ROM. No problems here & I did the reset without issue but of course it said the IMEI was invalid again.

Here's the stupid bit, get ready for this.

The wifi did not appear to be working anymore, it could see my network adapter but could not get any sort of internet connection. One of the WIFI options was NVRAM err 0x10 so I assumed this was something to do with the problem (I have since looked this up & found it would have been easy to fix).

I thought that I might as well go back to the start & try reflashing the ROM. I chose the format all + download option to clear everything & start again but shortly after the process started I got an error message (I wish I could remember what it said) & my phone is now completely non-responsive. A hard-brick. Windows did say that it found a new device part of the way through & started installing some drivers so that may have caused the problem.

The stupid bit: it turns out that the internet connection to my house dropped out for about half an hour. The phone was just fine.

I do not think that all is lost. The computer makes a noise when I plug my phone in & the device manager shows a mediatek DA USB VCOM device under ports. The problem is that SP flash tools cannot see the phone at all so I cannot try flashing again.

Any suggestions for an idiot that cannot turn his phone on?

[Athos]

Hmm, I think you are doing fine with respect to finding solutions. Perhaps just a bit panicky, but no, I wouldn't say idiotic.

Excellent if PC recognizes the phone with no problems. Have you tried a fresh installation of SP flash tool? Different version? (ie 5.xx if you're using 3.xx and vice versa) you also mentioned that PC automatically installed a different set of drivers. Make sure you track down the first installation and get rid of it. Uninstall all your previous phone's IDs on PC.

Have you tried pressing down on the hard buttons while flashing? It would be a trial and error of button combinations, I guess. You can take a look at the sp flash tool error thread in tutorials section. There are some tips there.

[leesnose]

All sorted. I took your advice athos and cleared all the old installations out. I used a program called USBDeview to get all of the old drivers out & then started again with the drivers that Doogee have on their website.

SP flash tools successfully flashed the official ROM & we are up & running again.

After this my PC was refusing to recognise it as anything other than external storage but I resolved this by installing PDAnet without the phone connected to the computer - took a while to find that out.

It is worth mentioning that I could not change the IMEI numbers using the engineer mode because it said it was not possible in "user build" whatever that means. Not an issue because MTK tools did it just fine.

Everything is now all shiny and working perfectly. Thank you to the helpful people on this forum that led me to where I am now. I hope that someone else reading this will find their way back from the brick.