[Android General] sayannayas:
I have a spreadtrum 6820 not sure it is sp6820 or sc6820.I have stopped treating myself as noob and give excuse. After extensive search & learning I came up with some idea how to root/unlock or install custom rom in this phones.Want all of you guys to keep this thread active if possible.

Spreadtrums are cheap phone market but nowadays a lot of Asian company are re-branding it.So it Still not a dead prospect.

Below are my records, my hits & misses.Still now I am in Soft Bricked mod with bot logo Stuck Screen.I will keep on updating this post with my trails.

Foreground

Typically this phones have

A fastboot mode

A useless recovery mode

A locked boot.img (thats why even chmod or simply pushing a su will not root the phone)

A IMEI number(which if you mess up after flashing,you will not get any radio signals)

Ways you can make a backup

Installing CMW will not be much trouble.Backing up with it will be.I have tried couple of times to backup using CMW it stucks at yaffs files while

trying to backup system.img and reboots without creating a full backup.

Even if you succeed CMW flashing DONT flash any update.zip if you are not able to backup.It may mess up with your baseband.(mine did).Experts may say it is weird but it did messed up all my wifi and sim settings.

If you have already flashed something and stuck like me in bootloop. Do the followings in steps.

1.Try to hard reset your phone,remove any cache you have.

Goto recovery mode(sorry,if you cant find one),factory reset your phone pulloff/plugin battery restart your phone

2.Flash back stock recovery img

Goto stock recovery and flash stock recovery img.Follow end of this post how to get a stock recovery img.

3.Flash back a system img

Ah!this hurts me again,according to the new protocol,it is difficult to flash an image with large size.But i am not very sure why 200mb file is also it is not allowing me to flash.What i found out you have two ways to go around this

1. Repartition you system partition and increase your peace.

2.Unpack your system img and delete the useless APP folder repack it again to reduce its size and then flash.

Unpacking will be a breeze,just download yaffs and follow intrusctions

Repacking,emm....,you need a unix vbox and run some commands which i havnt exploited yet.

Installing custom rom or Stock rooted rom/Stock unrooted rom

Stock unrooted rom

The only way this achievable as I discovered is using research downloader(a real mystery app to me :P) and having a PAC file (a compatible package file that this app can load).Even if you some how manage system.img,boot.img,recovery.img files you can create your own PAC files.

Follow EXACTLY as this thread originator tells

1.Windows XP 32 bit (dont fall into crapy windows7 trusted certificate issue,it is only marketing strategy believe me)

2.Install all the drivers(no yello marks for Serial to usb adapter icons,adb adapter).YOUR COM PORT MUST SHOW TOO NEW PORTS.

3.Your phone after plugin in should not go to battery charging logo.

Now this where the mystery lies.

This means that your usb ports are active and serial to usb adapter may not work?.If i disable this usb ports will Serial to USB adapter works?

Now using research downloader is easy.But you may be one the victims like me who just cannot make it work.

Below are my estimations how you can make it work(this estimations may be totally wrong,but may give you some hints)

1.Be sure you have correct FDL1 and FDL2 files ,if you see status as waiting in research downloader.It is of no use.It havnt detected.

2.Choose only 115200 baudrate.

3.dont let your phone goto charging mode/dont let your phone get discovered as a usb mass storage.

4.You can enable logging but the messages that i got from there is above my head.

go to research download folder and look for DiagChan.ini file,there you can set any log levels you want.

Stock rooted rom

You need a unlocked boot image first.Which can only be done if you can repack it in unix box.I dont have much idea how to achieve this right now.Give it a shot,I will too.

custom rom

You can install NovaDriod ad posted by xda developers.But be aware of taking backup before exploring the unknows.If you are middle of a dead space like me without any backup,go ahead and see if this works.

Thanks Guys for reading,request all of you to keep this post active and follow up with your development work.