If you use QDL to get 2.2 can the phone be brought back to 1.6? - Streak 5 Q&A, Help & Troubleshooting

My buddy wants me to get 2.2 on his new Streak. He bought a locked ATT one. I found that there's a tool called QDL that flashes EU software to the phone by bypassing some security stuff. I don't see it as an issue as the only difference between the EU and US is the carrier lock. My friend wants to know that, if for some reason the phone fubars, can we run some sort of recovery to bring the phone back to 1.6? Basically back to it's original state.
Also, once you run the tool does the phone accept the EU OTAs?

---

Any ideas?
Sent from my ADR6300 using Tapatalk

---

I'd like to know also. In case I want to try the att 2.2 release ...... oh wait, I probably wont have this phone for 2 years
Sent from my Dell Streak using Tapatalk

---

Used qdl on my friends at&t locked streak and it put US 2.2 on it build 305 then I manually flashed to build 309 then 318. It should still get the US ota updates as the build and baseband version show up just like my unlocked streak does.
Sent from my Dell Streak

---

Where do you get the 309 & 318 updates? How are they flashed? Stock or CWM recovery? Are they updates that need to be installed in order or full packages where I can just flash the latest?
Sent from my ADR6300 using Tapatalk

---

shoman24v said:
Where do you get the 309 & 318 updates? How are they flashed? Stock or CWM recovery? Are they updates that need to be installed in order or full packages where I can just flash the latest?
Sent from my ADR6300 using Tapatalk
Click to expand...
Click to collapse
You can find download links on xda or let me know and I can send them to you. not sure if they have to be installed in order or not.
I flashed them using the stock recovery.
Sent from my Dell Streak

---

Its funny, I still can not find an answer to the original question. Is it possible to get back to the original at&t 1.6 rom, say for warranty/return purposes?
Sent from my Dell Streak using XDA App

---

It should be possible by following the guide at modaco.com. It takes you from 1.6 to 2.2 and has a process to go back.
If you can't find the links let me know and I will dig them up. I used that guide on my first streak. Got to froyo then back to donut when I had to send it back.
Sent from my Dell Streak

---

Did you restore to the at&t factory 1.6, or the unlocked?
I couldnt wait, so I just upgraded to the oficial 2.2 this morning. Wow!
Like having a new, new phone.
Sent from my Dell Streak using XDA App

---

slaydog said:
Did you restore to the at&t factory 1.6, or the unlocked?
I couldnt wait, so I just upgraded to the oficial 2.2 this morning. Wow!
Like having a new, new phone.
Sent from my Dell Streak using XDA App
Click to expand...
Click to collapse
Yeh it restored to the original locked 1.6. Started at that went all the way up to unlocked 2.2 then back down to locked 1.6

---

Nice, thanks for the info.
Sent from my Dell Streak using XDA App

---

QDL how to use?
Hello
Have ubuntu 16 04
qdl from https://github.com/96boards/documentation/blob/master/consumer/guides/qdl.md
Bricked LG G5.
Unpacked ROM for above.
Need put new boot.img in phone.
From terminal;
[email protected]:~$ qdl
qdl [--debug] [--finalize-provisioning] [--include <PATH>] <prog.mbn> [<program> <patch> ...]
May I ask how to use it?
Vale Piotrt