Fix: I Restored My iTel A80 (A671L) DIAG Port After It Was Broken
Hey, I just wanted to quickly share something in case it can be of assistance to someone.
I was attempting to fix an ancient iTel A80 a few days ago (model A671L, I know, odd nomenclature). In any case, the phone was turning on without any issues, but despite my best efforts, I was unable to get DIAG mode to function. I was stuck since tools couldn't detect it.
After a lot of experimenting (and nearly giving up), I finally discovered a technique that works. Once you know what you're doing, it's fairly easy. This is what I did.
I was attempting to fix an ancient iTel A80 a few days ago (model A671L, I know, odd nomenclature). In any case, the phone was turning on without any issues, but despite my best efforts, I was unable to get DIAG mode to function. I was stuck since tools couldn't detect it.
After a lot of experimenting (and nearly giving up), I finally discovered a technique that works. Once you know what you're doing, it's fairly easy. This is what I did.
The Issue
In essence, you cannot perform tasks like IMEI repair, QCN backup, or SIM unlocking if your computer does not have the DIAG port. I had flashed the phone earlier, so obviously something went wrong in my situation.
It turns out that some system partitions were corrupted, and some functions may have been prevented by anti-crack security.
In essence, you cannot perform tasks like IMEI repair, QCN backup, or SIM unlocking if your computer does not have the DIAG port. I had flashed the phone earlier, so obviously something went wrong in my situation.
It turns out that some system partitions were corrupted, and some functions may have been prevented by anti-crack security.
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What You’ll Need👇
You don’t need anything fancy — just the basics:
- A Windows computer
- USB cable (decent quality)
- Pandora Tool (free to use)
- Two files:
- A dump file to fix the broken partitions
- The stock firmware (ROM) for the A80
Step 1: Restoring the Dump File
This is the part that brought the DIAG port back to life for me.
Dump File Download👇
Here’s how I did it:
- First, I turned off the phone completely.
- Booted it into EDL mode (Google it if you’re unsure — a test point might be needed).
- Plugged it into my PC.
- Opened Pandora Tool and loaded up the dump file.
- Hit restore — waited a few minutes.
Once it finished, the phone still booted — and boom — DIAG mode was back when I checked on the PC.
Step 2: Flash the Stock ROM — but Carefully
Just to clean things up, I decided to flash the original firmware. But there’s a catch here: if you flash over the wrong partitions, you could mess up your IMEI or network settings.
Stock ROM Download👇
Before flashing, make sure you SKIP these partitions:
- NV_LTE
- TDFS
- TRANSEC
Here’s what I did:
- Loaded the firmware in Pandora.
- Unchecked those three partitions.
- Started the flash.
- Waited it out and rebooted the phone.
The Result?👇
Phone booted up perfectly. DIAG port worked like normal, and the phone was smooth. No signal issues, no IMEI loss. Everything just… worked.
Quick Tips
- Install Qualcomm drivers if your PC doesn’t recognize the phone.
- Use a short, good-quality USB cable.
- Don’t panic if Pandora freezes for a second — just be patient.
In Short👇
If you’ve got an iTel A80 (A671L) with a broken DIAG port, don’t give up on it. This method works. It’s just two main steps:
- Restore partitions with a dump file.
- Flash the stock ROM, but skip a few sensitive partitions.
Took me under 30 minutes from start to finish once I had the files.