Asus T-Mobile Cellspot

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After you have installed \ downgraded T-Mobile's software, you will want to change the firmware: [http://elatov.github.io/2014/11/dd-wrt-on-asus-rt-ac68u-router/ there is a good article discussing the various versions of firmware here.] After you have installed \ downgraded T-Mobile's software, you will want to change the firmware: [http://elatov.github.io/2014/11/dd-wrt-on-asus-rt-ac68u-router/ there is a good article discussing the various versions of firmware here.]
- Key Objectives:+ High Level Steps:
* Gain Telnet Access: flash TMO 1703 firmware via CFE webserver * Gain Telnet Access: flash TMO 1703 firmware via CFE webserver
* Copy original CFE to USB memory stick * Copy original CFE to USB memory stick

Revision as of 03:09, 25 August 2015

Contents

SUCCESS? BE A CONTRIBUTOR!

If you are successful and have learned something that would help others ("gee I wish I had known this before I started"), then take a minute to update this wiki. Isn't it better to consolidate knowledge here than to wade though hundreds of postings?

WARNING: DO NOT CONNECT ROUTER TO THE INTERNET

At least wait until you finished flashing your device. Failure to heed this warning can result in the device automatically configuring itself to block DD-WRT flashing.

Asus Cellspot TM-AC1900RT --> RT-AC68U Upgrade

!!!!! WORK IN PROGRESS !!!!

This wiki's purpose is to provide an up-to-date and concise how-to for first-timers. Kudos to contributors have taken the time to document this guide by consolidating and condensing postings from newsgroups. Please add content if you had success flashing your cellspot. Otherwise, please try to successfully flash your cellspot before contributing to the wiki. For your convenience this page can be easily referenced with:

http://tinyurl.com/asuscellspot

Key contributors to developing and organizing this content include: UKEE, Mysticales, cdmarshall, madman999

CFE Downgrade is necessary to enable flashing firmware

This upgrade is a little trickier than most because the procedure involves not only navigating DD-WRT firmware, but navigating the CFE The newsgroups document that CFEs are able to control / deny firmware upgrades, which is the reason for 'downgrading' to firmware that does not have this capability.

******Updated guide to CFE Mod ****** here but doesn't mention flashing firmware

Version 2827 is firmware locked to only TMobile branded firmwares. Not only is the firmware locked (disabled Telnet), it installs CFE 2.1.2.2, which locks the router from any non TMobile branded firmware via recovery mode and GUI mode. The only way to change firmwares is to downgrade to an older TMobile firmware (1703 for example), enable Telnet, and then replace the CFE (preferrably with an Asus RT-AC68U version - such as 1.0.2.0).

Many details in this guide including links to the older 1703 firmware and all CFE's and utilities needed


if you're on CFE 2.1.2.1, which is not locked, and try to use the latest Asus branded firmwares, it will update your CFE and, lockout out all non TMobile firmware's again. Once you get to DD-WRT, doesn't matter anymore unless you decide to go (back) to Asus stock RT-AC68U firmware, latest copies.

For more information see UKEE's post here.

Links: verified firmware

There are numerous choices each with its strengths. DD-WRT / Kong are filled with features. Merlin to stay as close to the original firmware for performance.

1) FIRST asus_rt-ac68u-firmware.trx THEN flash dd-wrt.v24-K3_AC_ARM_STD.bin (per cdmarshall)

2) BRAINSLAYER BUILD: RT-AC68u 27413 (per MDA400 and gatorback)

3) KONG BUILDS: Link to Kong Builds. Kong Build information Please update as you see fit.

4) Merlin Build: this is the weapon of choice and can be found in the tmo2ac68u package

Links to tools and other files

Asus tools to revert FW ("Engineer" or UKEE to verify this).

Links: verified CFEs

Verified: 1.0.2.0 from the tmo2ac68u package.

CFE_ASUS_RT-AC68U_1.0.2.0 (US).txt

CFE_ASUS_RT-AC68U_2.1.2.1 (US).txt (??? user to verify)

Procedure

Before starting the process, obtain the tmo2ac68u package. Tools and Firmware used in this process must be obtained and unzipped. Copy the mtdwrite utility and the target CFE to a flash drive.

Fortunately, there is a (lengthy) YouTube video that demonstrates the different processes below. gatorback: because it is lengthy I skimmed through it ONLY when I was stuck.

After you have installed \ downgraded T-Mobile's software, you will want to change the firmware: there is a good article discussing the various versions of firmware here.

    High Level  Steps:
      * Gain Telnet Access: flash TMO 1703 firmware via CFE webserver
      * Copy original CFE to USB memory stick
      * Copy data from original CFE to target CFE
      * MTD-write target CFE to boot sector
      * mtd-erase2 nvram 
      * nvram get bl_version
      * Flash final target firmware via CFE Webserver

1) Enable Telnet: Place router in recovery mode and upload TMobile firmware xxx.1703 (found in tmo2ac68u package) through the CFE web UI. Enable telnet by navigating: Administration -> System -> Enable Telnet=Yes -> click 'Apply'

[Image:http://s29.postimg.org/x3qzmw847/Snap1_CFE_Webserver.png]

Alternative method: An alternative to flashing 1703 to enable Telnet Caution: If you enable telnet, then erasing the NVRAM may disable efforts that enable Telnet.

Always perform a NVRAM reset after flashing firmware, reboot and allow 5 minutes to rebuild NVRAM variables.

    * HARDWARE NVRAM RESET:
    ** Power off the router
    ** Hold the WPS Button
    ** Power on the router and keep the WPS pressed for 10-15 seconds
    ** Reboot as necessary 

2) Check your CFE Version via telnet and change the CFE to 1.0.2.0. PRINT THE INSTRUCTIONS FROM THS LINK AND CHECK OFF EACH STEP PERFORMED:

    nvram get bl_version

This process involves telnetting and copying the existing CFE to retrieve data to USB stick, paste this data into the target downgrade CFE file, and writing the modified target CFE file back to the router.


3) Place router in recovery mode and install Merlin firmware via through the CFE Webserver recovery mode (easier).

4) Perform NVRAM reset 5) Go to your fridge and reward yourself with your favorite beverage and sign your username here:

gatorback

Optware Installation

Optware for Merlin Firmware in 3 steps:

1.Mount the ext4 formatted disk;

2.Go to router’s web interface -> USB Application and install Download Master

3.Once successfully installed, uninstall it (not disable). The Optware package will remain installed


OTHER RESOURCES

Tests to perform after installing DD-WRT firmware

  • NVRAM available immediately after install
  • Speed Test measurements in 2.4 and 5 Ghz bands
  • Verify USB 3.0 speed measurement
  • Optware (OTRW) compatibility
  • Please update any other meaningful or useful test metrics / measurements