MiFi v2.27 no 3G, bricked by v2.271

doujinflip · 2018-04-21T09:28:36.243Z

I have a MiFi that when upgraded to v2.27, completely lost access to the cellular data network. I noticed it could see the modem, but trying new settings in the GUI never seem to stick, and nothing done in LuCI helped either.

I have also attempted without success:
Downgrading without saving settings.
Swapping SIM cards.
Swapping physical modems.

I tried to upgrade to v2.271, but after upload and hash verification the Reboot button did not seem to work. I waited 5 minutes before forcing a power cycle. Now it seems to be bricked: power LED is on, but the only other activity is occasional blinks from the 3G LED.

Is there anything else I could try, or is this thing hosed?

alzhao · 2018-04-21T10:12:19.907Z

are you using a mifi with battery? Can you connect your charger to make sure it has enough power. Also take it to where there is good signal to check.

doujinflip · 2018-04-21T13:30:29.914Z

It does get signal, the GUI said it was getting signal. It was working fine last month before the update actually

kyson-lok · 2018-04-22T01:26:05.938Z

@doujinflip Download v2.271 here, and upgrade again manually. Guide Debricked.

doujinflip · 2018-04-22T11:56:17.748Z

@kyson-lok Thanks for the unbrick instructions, I was able to reimage the MiFi

However, the original problem still remains: The cell modem still cannot access the data network. I know that the device is not blacklisted, and the APN settings are correct. Even reimaging to previous versions via uboot doesn’t seem to help

ntelmifi_v2271_01942×705 97.7 KB

alzhao · 2018-04-23T02:35:31.438Z

Maybe you can just reset the firmware then start over.

Then use the auto config settings of the UI to setup the modem.

doujinflip · 2018-04-24T14:03:34.504Z

I’ve tried that, multiple times. Even a full uboot reimage doesn’t get the modem to translate cell signal into mobile data

doujinflip · 2018-04-24T21:20:21.352Z

Ok, turns out I was inserting the SIM backwards Silly me. Everything seems to be working fine now, thanks for this learning experience!

mifi2271nosimcrop