[Sprint HTC One (M9)] jpwhre:
One more edit: you can give this a try. Post count is 1266. Expand thread and read few posts before and after and decide if this works for you. Still have m9, still use it on Wi-Fi only, but not activated and can't test.

https://xdaforums.com/showpost.php?p=74544475&postcount=1266

LAST EDIT: my Note 8 will be waiting for me at home when I get off work. After nearly 10 years with HTC, they have lost complete touch with their users, I'm out. I will no longer be involved with this thread, leaving it up to group.

I haven't been able to test this. Use caution.

4-16-17
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Update for Android 7

Flashing SuperSu 2.46 on stock rom with twrp 3.1.0-0 doesn't reboot

Flashing SuperSu 2.65 on stock rom with twrp 3.1.0-0 constant boot loop.

Flashing SuperSu 2.79 on stock rom with twrp 3.1.0-0 data would show it was on but always showed "Unable to establish data connection" in top corner and no changes to settings would fix.

No other versions of SuperSu tested.

Flashing stock rooted rom from https://xdaforums.com/sprint-one-m9/development/ruu-sprint-htc-one-m9-1-32-651-17-t3073355 and doing wifi tether fix showed no connection at all, and going to setting would cause a crash instantly.​

As of now, there is no fix for Android Nougat for wifi tether using this method.

Wifi tether working on stock Sprint m9 rom, on stock Sprint m9, on Sprint network only.

​

Back up your device before you attempt!

​

I'm not responsible for what you do. This is just what I did. I have s-off, don't know if it matters.

Only currently tested on current stock rooted rom. As rom updates, I will keep this post updated.

0PJAIMG_Sprint_HTC_One_M9_3.41.651.41_RUU.zip

Download .zip file https://xdaforums.com/sprint-htc-on...hotspot-4g-t3058244/post59613303#post59613303

Install thru recovery

You will see screen

You're about to flash:

BadBoyz 4G Tether Fix for HTC One (M8) Sprint (Yes, we are installing this on the M9)

Version : 2

Updated : March 22nd, 2015

Press Next to continue the installation...

Hit Next

Which ROM are you running?

Select

I am running another Sprint Sense 7 ROM with init.d support

ready to install

press Next to start the installation...if you want

to review or change any of your installation

settings, press Back

Hit Next

installing

installing BadBoyz 4G Tether Fix 2...

please wait until finished...

(BadBoyz Logo)

>>> Installing BadBoyz 4G Tether Fix

>>> Mounting partitions

>>> Extracting scripts

>>> Writing System

>>> Deleting TetheringGaurd.apk

>>> Setting Permissions

>>> Editing ACC

>>> Patching framework-res

>>> All Done!

script succeeded: result was [/data]

(If you get) script failed: result was [/data]

Press Next, finish install, and install again in recovery.

installation Completed

Congratulations...

BadBoyz 4G Tether Fix 2 has been installed

successfully.

tap Finish, and Reboot your device.

Thanks.

Hit Finish

Once device reboots.

Open Mobile Hotspot settings

Change

HOTSPOT NAME (SSID)

To something of your choice.

Change

PASSWORD (8-63 ASCII CHARACRERS):

To something of your choice.

Click switch at top right to turn on WiFi Tether

Connect other desired devices to the network (SSID) you just created.

Enjoy tethering!