[Epic 4G General] hardrock121:
After tremendous searching and asking for help from members.. I got all these instructions which I am compiling for myself and others who might need it.

Disclaimer:

I have tried these instructions as it is and worked fine for me. Now I have GPS lock in <5secs and with a accuracy of 5-10m. Tried it atleast 5-6 times at different times and still seem to work fine, unlike while I was on 2.1 before. Feel free to suggest any modifications or corrections.

Assumptions:

You have used OTA update.zip to go to Froyo and have no GPS at all

You are on windows machine

You have guts to flash back to older firmware and not brick your unit like other did (possibly restored too)

Atleast I am not rooted before or after update. Not sure how thats gonna affect this process.

Files needed

(PC only)

DI18 .tar.md5

http://www.multiupload.com/X9AB1U56JV

odin & pit

from the wiki link

http://www.sdx-downloads.com/devs/noobnl/Odin3+v1.61andepic.pit.zip

Step1: ODIN [worked perfectly,had to install samsung drivers]

1. Open odin

2. Put your phone in download mode (Shut it off, wait for lights to all go out, then hold 1 on the keyboard while powering up)

3. connect phone (you should see odin put a Com4 or something like that in the first box. The actual number is NOT important what is important is something popped up there when you connected your device, meaning ODIN can see it)

4. Select the victory_8G_100528.pit on the right in the pit section. Some say pit is needed..some say not needed. I am going to put it in and try first.

5. In the PDA Section you place either the full Stock tar (SPH-D700-****-8Gb-REL.tar around 300mb~) for a full wipe and full return to stock. This is what you downloaded from above multiupload.com link. Its about 255 mb.

6. Hit start. It will do its thing. Doesn't take long you can see the progress bar. If it sits on File Analysis for longer than 30 seconds its not going to happen. See the troubleshoot section below.

7. Device should reboot and should be done.​

Step 2: GPS LOCK[ Got instant lock]

Fire up Google Maps app and wait for it to lock your location.

If your GPS doesnt lock after sometime.. try these steps.

In your dialer, type *#1472365#

click "Setup" tab

Then:

Operation Mode: (MSBased)

Back out

Starting Mode: (Cold Start)

Back out

Session Type: (Single Fix)

Back out and reboot your phone.​

Step 3: Flash back to DK28 [ not sure why we cant use update.zip as we did before for this process]

1. Download DK28 .tar file here http://www.multiupload.com/C5YEZK3WF7 <== DONT USE THIS, YOU WILL GET MD5 HASH INVALID.:confused::confused:

Use this instead http://www.multiupload.com/A4HRBSEB7X

2. Follow the same steps as above in STEP 1 instead use the above file in the PDA section.

Note: There doesnt seem to be a pit file for this flashing. Please let me know if thats accurate.

Note2: I didnt use any pit file for this step, and it worked fine.

NOTE1: The.md5.tar seems to wipe out everything and there is no alternative

NOTE2: Some people have suggested to remove the SD card before running ODIN. I am not 100% sure.

NOTE3: You will need to get samsung drivers if ODIN doesnt recognize the phone. Also ppl are saying samsung cables are crap, so if ODIN doesnt recognize then you may have to swap out the cables.

NOTE4: If you are stuck in the download mode (yellow digging android) and you have NOT started the flashing/odin process yet, just pull the battery out and it will be normal. IF YOU STARTED THE FLASHING/ODIN PROCESS,PULLING MIGHT HOSE YOUR PHONE.

32-bit drivers: http://firon.net/xda/Samsung_Mobile_...00_Epic_4G.zip

64-bit drivers: http://firon.net/xda/usb_drivers_GalaxyS_x64.zip

I ll keep adding as I find more info.. Hope this helps.

Thanks every one for their feedback.

PS: This is almost accurate.. I have followed them as it is and they worked for me.

Update: I followed every step to the T in the above guide and have been able to get back to froyo and gps lock successfully. Tho the first gps lock was only 60m inside the house. I will play around more and post updates.

Update 2: I get a accuracy of about 5-10 m now.