[Sprint HTC One (M7)] thronnos:
Ok, after seeing some major call integrity gains by enabling evrc-b I decided to dig a little deeper. This is going to be an on going project of mine to help us get some better performance out of these beasts!

Requirements

1. Sense ROM with access to EPST

2. Your MSL

3. The ability to not panic if you mess up something

4. Root

Disclaimer

Your messing around in EPST, if you don't know exactly what that means you should google it because if you break something it's your fault not mine.

Now then! Onto the fun stuff! Please if you have anything to contribute please post and if you have real world experiences in how you have benefited I'll add it to the OP!

Note -- I highly advise you write down all your initial settings and keep them safe just in case

Call Quality and Integrity

1. Open the dialer and type ##778# and input your MSL (edit mode)

2. Open CDMA settings and scroll down to the bottom, you will see three settings. Home Page, Home Orig, Roam Orig. Change all of these to EVRC-B.

3. In the right hand corner tap menu and commit modifications.

This will help you maintain calls and help keep a higher quality of service when in a weak signal area. This is a noticeably big difference. With EVRC enabled I get a ton of dropped calls at home. With evrc-b enabled I get none. Like I can change these in real time and see the difference.

Call Integrity (possibly incorrect configuration looking into fixing)

1. Open your dialer and type ##778# and input your msl in edit mode.

2. Go to the NAM setting menu and scroll to the bottom. You will see an Access Overload setting. This effects the priority of your calls on the network. The higher the number the better. Change this setting to 9.

3. Hit the menu then commit modifications.

You should only see a difference when the network is experiencing a high call volume. Your calls will have priority over them. A side note, I've seen conflicting information for this. The Information I'm using is based off Wikipedia and Government listings. 10 is reserved for test and alert signals, 11 is for emergency services and 12-15 are reserved channels and I would not use them unless you want to risk getting in legal trouble.

Call Responsiveness

1. Open your phones dialer and dial ##778# and enter your msl in edit mode.

2. Go into the Modem settings and the Top option should be Slot Cycle Index. change this setting to SCI 1.

3. Hit menu and commit modifications.

This should help your phone feel and act a little more responsive (not talking about UI speed, but network speed) as it makes your phone poll and communicate with the towers more often. Other benefits to increasing the amount of polling your phone does remains to be seen. Negative effect on battery is possible and probably guaranteed. Also, as a side note. You can drop the setting to 0 but I feel that 1 wouldn't effect the battery as negatively. Plus some more information, towers broadcast at the '1' level and phones by default ping the towers at the '2' level. So better service or better battery?

Data up/down Speed Increase

1. Open your phones Dialer and type ##3282# and enter your MSL in edit mode.

2. Go to Advanced and scroll to the RTSP/HTTPS settings. Change the proxy servers to 0.0.0.0 (or leave them blank if you choose) and change the proxy ports to 0.

3. Hit ok then menu - commit modifications.

This makes it so your phone doesn't route through sprint. This is a tried and true method to get noticeable gains.

D3rped out Beastmode! HTC ONE!