Jump to content
lilotimz

Samsung Galaxy S4T L720T [Trimode] User Discussion Thread

Recommended Posts

I doubt it'll be free even if you find it.

 

Sent from my SPH-L710 using Tapatalk

I don't mind that, I just know that it's $199 on contract at Sprint right now which is crazy.

Share this post


Link to post
Share on other sites
Guest DigiClaws

I checked sprint.com and they are giving $135 for the SPH-L720 through their buy back program. That makes the SPH-L720T only $65 + tax. I may end up doing that. Or should I hold out to see what new tri-band phones are coming out in the next few months?

Share this post


Link to post
Share on other sites

I checked sprint.com and they are giving $135 for the SPH-L720 through their buy back program. That makes the SPH-L720T only $65 + tax. I may end up doing that. Or should I hold out to see what new tri-band phones are coming out in the next few months?

I guess it just depends on how much you want a new phone.

Share this post


Link to post
Share on other sites

I checked sprint.com and they are giving $135 for the SPH-L720 through their buy back program. That makes the SPH-L720T only $65 + tax. I may end up doing that. Or should I hold out to see what new tri-band phones are coming out in the next few months?

I'll buy your s4 for $150 ( if it's in good condition.) :P

 

Sent from my LG-G2

 

 

Share this post


Link to post
Share on other sites

Can you get rid of knox, root, and run custom ROMs on they 720T?

 

Any idea if 720T ROMs will be common or will people just make 720 versions?

Share this post


Link to post
Share on other sites

Can you get rid of knox, root, and run custom ROMs on they 720T?

 

Any idea if 720T ROMs will be common or will people just make 720 versions?

Is there enough of a difference in the two devices where a 720 root method or ROM wouldn't work on a 720T?

 

-Mike

Share this post


Link to post
Share on other sites

Is there enough of a difference in the two devices where a 720 root method or ROM wouldn't work on a 720T?

 

-Mike

That's what I would like to know too. I just assumed having 2 more radio bands would make a big impact in the firmware at some level.

Share this post


Link to post
Share on other sites

That's what I would like to know too. I just assumed having 2 more radio bands would make a big impact in the firmware at some level.

The radio firmware/baseband will be different, but that is separate from the ROM. Unless other specs changed, it might be close enough to use the T radio with a 720 ROM. I'm sure someone on XDA will start playing around soon.

 

-Mike

  • Like 1

Share this post


Link to post
Share on other sites

I was thinking it would be more like if you have a Verizon ROM it won't work on your Sprint phone. Good to know.

 

Sent from my SPH-L900

 

 

Share this post


Link to post
Share on other sites

with it being triband i was under the impression that the snapdragon 600 wasn't able to do triband so that would make me think that the processor has been upgraded as well maybe the snapdragon 800 or a different processor all together 

Share this post


Link to post
Share on other sites

with it being triband i was under the impression that the snapdragon 600 wasn't able to do triband so that would make me think that the processor has been upgraded as well maybe the snapdragon 800 or a different processor all together 

 

The colloquial Snapdragon 600 is a standalone processor.  People need to understand that not every Qualcomm chipset incorporates a baseband and that a standalone processor has effectively no bearing on the RF capabilities of a separate baseband.

 

AJ

Share this post


Link to post
Share on other sites

The colloquial Snapdragon 600 is a standalone processor.  People need to understand that not every Qualcomm chipset incorporates a baseband and that a standalone processor has effectively no bearing on the RF capabilities of a separate baseband.

 

AJ

While AJ is, of course, correct we have no indication that this is a new modem, either. Also, I don't think there's any reason 9x15 modems can't be Sprint Tri band.

Share this post


Link to post
Share on other sites

While AJ is, of course, correct we have no indication that this is a new modem, either. Also, I don't think there's any reason 9x15 modems can't be Sprint Tri band.

 

I don't think the major specs are any different in terms of modem and processor than it is with the single band LTE GS4.  I just think new antennas were added for B26 and B41.  I wouldn't hold your breath on it.

Share this post


Link to post
Share on other sites

That was a question I was working up the courage to ask.  Is there any means to get this phone to tell me all about itself?  Are there any test apps or hidden screens that I can extract that data from?

Share this post


Link to post
Share on other sites

I don't think the major specs are any different in terms of modem and processor than it is with the single band LTE GS4.  I just think new antennas were added for B26 and B41.  I wouldn't hold your breath on it.

Uh, Eric, 9x15 was the original modem in the S4.

 

That was a question I was working up the courage to ask.  Is there any means to get this phone to tell me all about itself?  Are there any test apps or hidden screens that I can extract that data from?

You mean like this?

http://s4gru.com/index.php?/topic/2040-bars-lie-for-lte-signal-strength-how-to-determine-your-actual-lte-signal-strength/

Share this post


Link to post
Share on other sites

While AJ is, of course, correct we have no indication that this is a new modem, either. Also, I don't think there's any reason 9x15 modems can't be Sprint Tri band.

 

A major difference is that the MDM9615 standalone baseband is LTE Category 3, while the MSM8974 included baseband is LTE Category 4.  That has ramifications on the number of Resource Blocks that can be in use simultaneously and should affect performance on the 20 MHz TDD carrier(s) but not on the 5 MHz FDD carrier(s).

 

AJ

Share this post


Link to post
Share on other sites

A major difference is that the MDM9615 standalone baseband is LTE Category 3, while the MSM8974 included baseband is LTE Category 4.  That has ramifications on the number of Resource Blocks that can be in use simultaneously and should affect performance on the 20 MHz TDD carrier(s) but not on the 5 MHz FDD carrier(s).

 

AJ

I'm surprised it would affect 20 MHz of TDD since that's half of 20 MHz FDD, which is where the main gains in Cat 4 are.

Share this post


Link to post
Share on other sites

I'm surprised it would affect 20 MHz of TDD since that's half of 20 MHz FDD, which is where the main gains in Cat 4 are.

 

On the downlink, a 20 MHz TDD carrier has 100 RBs -- the same as in 20 MHz FDD carrier.

 

AJ

Share this post


Link to post
Share on other sites

On the downlink, a 20 MHz TDD carrier has 100 RBs -- the same as in 20 MHz FDD carrier.

 

AJ

Interesting, So then what's the maximum theoretical download on a MHz TDD carrier?

Share this post


Link to post
Share on other sites

 

 

I'm not sure.  The title of that thread is:

"Bars Lie for LTE Signal Strength! How to determine your actual LTE signal strength"

 

I'm looking for identification of components, not signal strength.  I want to help answer these questions:

 

What processor?

What modem?

 

Is there a needle in that haystack of a thread that will get us there?  Or will I only learn how to gather information different from what we need, the hard way, and that is already available in Signal Check Pro?

 

 

I don't think the major specs are any different in terms of modem and processor than it is with the single band LTE GS4.  I just think new antennas were added for B26 and B41.  I wouldn't hold your breath on it.

 

 

While AJ is, of course, correct we have no indication that this is a new modem, either. Also, I don't think there's any reason 9x15 modems can't be Sprint Tri band.

 

 

The colloquial Snapdragon 600 is a standalone processor.  People need to understand that not every Qualcomm chipset incorporates a baseband and that a standalone processor has effectively no bearing on the RF capabilities of a separate baseband.

 

AJ

 

 

A major difference is that the MDM9615 standalone baseband is LTE Category 3, while the MSM8974 included baseband is LTE Category 4.  That has ramifications on the number of Resource Blocks that can be in use simultaneously and should affect performance on the 20 MHz TDD carrier(s) but not on the 5 MHz FDD carrier(s).

 

AJ

 

 

p.s. that thread also states this:

 

NOTE: iPhones, LG Android devices and Triband LTE devices are not affected.  They do show LTE signal accurately.  Also, many Android 4.3 and later devices also show LTE signal strength accurately.  This thread will become obsolete soon as all Sprint devices in 2014 will be Triband and will display LTE signal strength correctly.

 

If you thought I was looking for signal data, for a Tri-Band question, it doesn't apply anyhow.

Edited by SturgeonGeneral

Share this post


Link to post
Share on other sites

I'm looking for identification of components, not signal strength.  I want to help answer these questions:

 

What processor?

What modem?

 

Is there a needle in that haystack of a thread that will get us there?  Or will I only learn how to gather information different from what we need, the hard way, and that is already available in Signal Check Pro?

 

I just did a quick search on Google Play, and found this: https://play.google.com/store/apps/details?id=com.cpuid.cpu_z

 

I tried it out and it doesn't seem to show modem info for me, but everything else is interesting. There are several other similar apps, but that appeared to be the cleanest and least gimmicky.

 

-Mike

Share this post


Link to post
Share on other sites

Using the debug / config screen, it calls out the MDM9615

 

That app worked.  Thanks!

 

 

 

 

 

Edited by SturgeonGeneral

Share this post


Link to post
Share on other sites

Using the debug / config screen, it calls out the MDM9615

 

No idea how to get it to tell the processor.

 

Did you miss my reply to you just above yours..? Also, for what it's worth, every article I could find about the S4T indicated that other than tri-band capability, it would have the exact same specs as the S4.

 

-Mike

Share this post


Link to post
Share on other sites

Did you miss my reply to you just above yours..? Also, for what it's worth, every article I could find about the S4T indicated that other than tri-band capability, it would have the exact same specs as the S4.

 

-Mike

 

 

Yep, but when I reloaded I saw it, installed the app quick, shot screens and edited.

Thanks Again!

  • Like 1

Share this post


Link to post
Share on other sites

Now that you have positively identified components to work with, what are the ramifications? What is good or bad about these? Compared to sensorly, I'm not seeing LTE connects until I get to places with least level 2 signal levels reported and generally that is 50%-66% success.

 

Is that a limitation of the device or can I do anything to improve upon that?

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • ENTER TO WIN A
    SNES CLASSIC EDITION

    small.SNESclassic.png.050ebdab96ff535a54
    in our Black Friday/Holiday Promotion

    Click Here for Details and to Enter

  • gallery_1_23_9202.png

  • Similar Content

    • By jakeuten
      Just a bit of insight. I live near UMD in Duluth, MN. Sprint's signal is clearly much 'dirtier' with a 1.0 SNR compared to T-Mobile's 20.4 SNR. I don't have a screenshot from the same time, but I get about a 22 to 29 SNR with T. I know that AT&T uses RRU's but I'm not too sure about Sprint or T-Mobile. Also, I didn't even know they had L2500 where I live, but I force checked it on my Samsung S7 (AT&T). 


    • By S4GRU
      Did you know that with many Sprint (Uniband) LTE Android devices, the signal strength indicator at the top does not show your LTE signal strength? Even if 4G or LTE is displayed next to it?
       
      That's right!  This signal displayed here is your 1x (voice signal), and it is not your 3G EVDO signal strength, nor your LTE signal strength.  Regardless of whether it says 3G or 4G next to it. This is the cause of a lot of confusion.  Also, third party apps like NetMonitor do not show accurate LTE signal strengths. They also only show the 1x signal strength, even though they may reference being connected to LTE.
      The purpose of this thread is to help educate the masses, because many people think they have a strong LTE signal, when in fact they do not. And then they are unhappy, thinking that Sprint LTE is really slow, even with a strong signal. LTE performance is very signal strength dependent. So, when you have a weak signal, you can expect much slower than peak results.
       
      There is only one accurate way to get your LTE signal strength, and that is from your LTE Engineering screen in your Debug menu. And we will discuss the different ways to get that below.
       
      ...In HTC, Motorola & LG Sprint LTE devices:
      Go in to your phone app, and dial ##DEBUG# Select LTE Engineering Go down to RSRP. The number under RSRP shown in dBm is your LTE signal strength. ...In Samsung Sprint LTE devices:
      Go in to your phone app, and dial ##DEBUG# Enter 777468 for your lock code Select LTE Engineering Go down to RSRP. The number next to RSRP shown in dBm is your LTE signal strength. ...In the Galaxy Nexus, Nexus 5:
      Go in to your phone app, and dial *#*#DEBUG#*#* Enter 777468 for your lock code Select LTE Engineering Go down to RSRP. The number next to RSRP shown in dBm is your LTE signal strength. The LTE Signal Strength Scale:
       
      Now you have determined your actual LTE signal strength in dBms your device is receiving, you can use the following scale below to determine its strength:
      Better than -88dBm RSRP is a strong signal Between -89dBm and -96dBm is a very good signal Between -97dBm and -105dBm is good Between -106dBm and -112dBm is fair Worse than -113dBm RSRP is poor Feel free to link people to this thread for explanation. Hopefully, this will clear up some confusion out there!
       
       
    • By antilamr
      Some history first;
      Been through all the highs & broken promise Lows over the last 18 years with Sprint, currently have 7 lines. My main areas of concern are where I live and my retirement cabin which are in a semi Sprint dead zones.
      My Note3 will hold onto 3g for dear life. I have to toggle airplane mode to return to LTE signal (while standing in my back yard). Once I enter the house it drops to 3g. Speed test at 4g is slow at best.
      In my front yard it's 3g unless I walk into the center of the street, togle airplane mode then can pick up SLOW 4g again(until I walk to my front door.) i know note3 is missing band 41 which is suposto help.
      The wife's Iphone6 is 3g in my front yard, lte in the middle of the street and drops to 3g when entering our house also. When on 3g and walking into the back yard, airplane mode to froce it to 4g and it sticks to lte once you enter the house again. 1 to 2 bars, 17mb down with 1.3mb up. It will hold onto the lte signal.
      Does anyone have any insight to what I should expect with a Note5? Sprint has programed the system so if our 3g signal is stronger, my phone will want to stay there, Will carrier aggregation solve this problem or will the Note 5 try and hang onto the stronger 3g signal at all costs?
      I'm able to pre order the Note5 for $249 with a $200 SAMSUNG REBATE. Hate to get all excited and sign on for another 2 years if the Note5 will be doing what the note3 is doing. I get the whole ehrpd and 3g improving the cell phone experiance. At this point im more interested in being able to use more than the 5mb per month my 7 phones average and finally be able to use some of the unlimited data I've been paying for over the last 18 years. I'm in West Orange County, CA. and travel to the SAN Bernardino mountains weekly. Experts please chime in. On the fence to switch carriers but want Sprint to suceed and be there when they do!
    • By nexgencpu
      Hopefully we can finally start seeing some user feedback. So far so good! it is without a doubt the best device ive owned!!!
  • Posts

  • Recently Browsing

    No registered users viewing this page.

×