尘封的记忆

I'm sure all of us who own Nexus 5s on Sprint are aware that the phone is one of Sprint's first devices to support their "Spark" Tri-Band LTE. I'm sure you're all also aware that Sprint says they'll send an update to allow us to use Tri-Band LTE in "Early 2014". However, if you live in one of the first Spark launch cities, you can activate and use Tri-Band LTE early using the following simple trick:


1. You need to acquire your six-digit MSL code. You can either do this by talking to Sprint customer service and asking for it, or you can get it from a logcat if you follow a few steps that I'll get to later in order to keep this simple.

2. Dial *#*#3282#*#* into your dialer. 

3. Select LTE and then Edit. Enter your MSL to access the menu.

4. On this screen, set both "Band26 Enable/Disable" and "Band41 Enable/Disable" to enable.

5. I was told set the Band priorities to the following: 
Band 25 - 0
Band 26 - 0
Band 41- 1

This prioritizes Band 41. 

6. Press the back button to reboot, and you're all done! So far (in Chicago) I've seen better LTE coverage indoors, and superior speed in general. 



If you need to get your MSL from a logcat, please follow the following steps:

0. Download the Android SDK and correct drivers for the phone (if you don't have this already you're doing Nexus wrong.)

1. Connect your phone to your computer, with USB Debugging enabled. 

2. Open a command terminal, change directory to wherever you have the Android SDK's platform-tools installed.

3. Enter "ADB devices" to ensure your device is properly connected. This should print your device's serial number.

4. Enter "ADB logcat" to print the device log. 

At this point the terminal window will start vomiting up tons of information. Wait for the scrolling to stop and then continue.

5. Now, on your phone, enter the dialer and type *#*#3282#*#*. 

6. Select "LTE/Edit" again.

7. At this point the terminal on your PC should spit out a few more lines. A few of them will look like this:
D/QC_RIL_OEM_HOOK(18638): sendOemRilRequestRaw returns value = 10
V/LG_SVC_ITEMS(18638): length =6 responseBytes=REMOVED itemValue=******
D/LG_SVC_ITEMS(18638): getCommands commandId 200 = ******-END
D/LG_SVC_CMD(18638): itemID = 200, Value = ******

Where the "*" values are the digits to your MSL. 



There you have it! If you've followed all the steps here, you now know your MSL (which is important to know) and have activated Tri-Band LTE on your device far ahead of time.

http://forum.xda-developers.com/google-nexus-5/general/sprint-enable-tri-band-lte-n5-t2530061

http://swantong.com/archives/42