Atts build.prop tweak results sg2

Looks promising. What did you usually get, prior to tweaking? I rarely get faster than 3 down.

I remember the build.prop tweaks in the Inspire 4g forum. They worked there so I don't see why they won't here.

Sent from my SGH-I777 using xda premium

trell959 said:

I remember the build.prop tweaks in the Inspire 4g forum. They worked there so I don't see why they won't here.

Sent from my SGH-I777 using xda premium

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Different device. I don't know about the GS2, but in the Infuse forums, ajerman proved that most of the RIL build.prop tweaks that worked for HTC devices were nothing but pure placebo effect on the Infuse. He set things to "clearly broken" values and still had good performance.

Entropy512 said:

Different device. I don't know about the GS2, but in the Infuse forums, ajerman proved that most of the RIL build.prop tweaks that worked for HTC devices were nothing but pure placebo effect on the Infuse. He set things to "clearly broken" values and still had good performance.

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Click to collapse

Different device indeed. Looking through the build.prop, I only found two values that could potentially be changed for data speed:


ro.ril.hsxpa=1
ro.ril.gprsclass=10

Maybe because I'm on cm7?


Anyway there isn't:
ro.ril.enable.dtm=
ro.ril.gprsclass=,
ro.ril.hsdpa.category=
ro.ril.hsupa.category= or
ro.ril.hsxpa=

And I've seen these on at&t phones.



Sent from my SGH-I777 using xda premium

trell959 said:

Different device indeed. Looking through the build.prop, I only found two values that could potentially be changed for data speed:


ro.ril.hsxpa=1
ro.ril.gprsclass=10

Maybe because I'm on cm7?


Anyway there isn't:
ro.ril.enable.dtm=
ro.ril.gprsclass=,
ro.ril.hsdpa.category=
ro.ril.hsupa.category= or
ro.ril.hsxpa=

And I've seen these on at&t phones.



Sent from my SGH-I777 using xda premium

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Click to collapse

Here is what I changed mine to and this is my results. I am on CM7 also.There is a thread somewhere that we hashed all this out already. I just deleted the two lines "ro.ril.hsxpa=1
ro.ril.gprsclass=10" and added these in place. I go from the 3-5Mb/s to 7-10Mb/s for my area. Add these below in the same location of the build.prop where you removed the two lines:

ro.ril.hsxpa=5
ro.ril.hsupa.category=7
ro.ril.hsdpa.category=48
ro.ril.enable.3g.prefix=1
ro.ril.gprsclass=12
ro.ril.enable.dtm=1

Sent From My KickAss ATT SGS2 SPORTING CM7

RockRatt said:

Here is what I changed mine to and this is my results. I am on CM7 also.There is a thread somewhere that we hashed all this out already. I just deleted the two lines "ro.ril.hsxpa=1
ro.ril.gprsclass=10" and added these in place. I go from the 3-5Mb/s to 7-10Mb/s for my area. Add these below in the same location of the build.prop where you removed the two lines:

ro.ril.hsxpa=5
ro.ril.hsupa.category=7
ro.ril.hsdpa.category=48
ro.ril.enable.3g.prefix=1
ro.ril.gprsclass=12
ro.ril.enable.dtm=1

Sent From My KickAss ATT SGS2 SPORTING CM7

Click to expand...

Click to collapse

Mine has no ro.ril entries whatsoever...

Where would I place these to test?

I found this info from two linked threads here on xda and had posted them back when the i777 first came out that shows what these things mean. Helps to explain what and why your are making these changes and the potential benefits.

ro.ril.hsxpa : inidcates hsxpa support of target network :
Code:
ro.ril.hsxpa=0 - UMTS r99
ro.ril.hsxpa=1 - HSDPA
ro.ril.hsxpa=2 - HSDPA/HSUPA

ro.ril.gprsclass : inidcates GPRS class of target network :

Code: Class 2 : 3 slots : 8 - 12 kbps upload / 16 - 24 kbps download

Class 4 : 4 slots : 8 - 12 kbps upload / 24 - 36 kbps download

Class 6 : 4 slots : 24 - 36 kbps upload / 24 - 36 kbps download

Class 8 : 5 slots : 8 - 12 kbps upload / 32 - 40 kbps download

Class 10 : 5 slots : 16 - 24 kbps upload / 32 - 48 kbps download

Class 12 : 5 slots : 32 - 48 kbps upload / 32 - 48 kbps download

ro.ril.hsdpa.category :

Code:
Cat 1 = 1.2 Mbit/s
Cat 2 = 1.2 Mbit/s
Cat 3 = 1.8 Mbit/s
Cat 4 = 1.8 Mbit/s
Cat 5 = 3.6 Mbit/s
Cat 6 = 3.6 Mbit/s
Cat 7 = 7.2 Mbit/s
Cat 8 = 7.2 Mbit/s
Cat 9 = 10.1 Mbit/s
Cat 10 = 14.0 Mbit/s
Cat 11 = 0.9 Mbit/s
Cat 12 = 1.8 Mbit/s
Cat 13 = 17.6 Mbit/s
Cat 14 = 21.1 Mbit/s
Cat 15 = 23.4 Mbit/s
Cat 16 = 27.9 Mbit/s
Cat 19 = 35.3 Mbit/s
Cat 20 = 42.2 Mbit/s
Cat 21 = 23.4 Mbit/s
Cat 22 = 27.9 Mbit/s
Cat 23 = 35.3 Mbit/s
Cat 24 = 42.2 Mbit/s
Cat 25 = 46.8 Mbit/s

ro.ril.hsupa.category :

Code: Cat 1 = 0.73 Mbit/s
Cat 2 = 1.46 Mbit/s
Cat 3 = 1.46 Mbit/s
Cat 4 = 2.93 Mbit/s
Cat 5 = 2.00 Mbit/s
Cat 6 = 5.76 Mbit/s
Cat 7 = 11.5 Mbit/s

ro.ril.enable.dtm=1: Boolean value when set to 1 allows ARFCN simultaneous transfer of Packet Switched (PS) and Circuit Switched (CS) data over the same radio channel

ro.ril.gprsclass=12: indicates the target 2G GPRS class of network.

Class 12 : 5 slots : 32 - 48 kbps upload / 32 -48 kbps download value to Class 10 : 5 slots : 16 - 24 kbps upload / 32 - 48 kbps download

ro.ril.hep=1: Not certain.

Suggested change to hep=0 if you have issues with HQ youtube videos over cellular data.

ro.enable.3g.prefix: Adds the 3G prefix to the operator name

ro.ril.hsdpa.category=14: Indicates the highest High-Speed Downlink Packet Access category.

Cat 8 = 7.2 Mbit/s
Cat 28 = 84.4 Mbit/s
Cat 14 = 21.1 Mbit/s

ro.ril.hsupa.category=7: Indicates the highest High Speed Uplink Packet Access category.

Cat 7 = 11.5 Mbit/s

ro.ril.hsxpa=5: Indicates HSXPA support of target network

0 = UMTS r99
1 = HSDPA
2 = HSDPA / HSUPA
5 = Not Certain.

RockRatt said:

Here is what I changed mine to and this is my results. I am on CM7 also.There is a thread somewhere that we hashed all this out already. I just deleted the two lines "ro.ril.hsxpa=1
ro.ril.gprsclass=10" and added these in place. I go from the 3-5Mb/s to 7-10Mb/s for my area. Add these below in the same location of the build.prop where you removed the two lines:

ro.ril.hsxpa=5
ro.ril.hsupa.category=7
ro.ril.hsdpa.category=48
ro.ril.enable.3g.prefix=1
ro.ril.gprsclass=12
ro.ril.enable.dtm=1

Sent From My KickAss ATT SGS2 SPORTING CM7

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Click to collapse

I bolded what I had in my build.prop and changed the two bottom ones to match what RockRatt has. I changed it from 14 and 5 to 48 and 7.

Should I also add the other entries to my build.prop or will it not make any difference?

Also, according to your last post though, you posted "ro.ril.hsxpa=2 - HSDPA/HSUPA" yet in your other post you have it set to "5" so Im wondeing what the 5 represents?

RockRatt said:

Here is what I changed mine to and this is my results. I am on CM7 also.There is a thread somewhere that we hashed all this out already. I just deleted the two lines "ro.ril.hsxpa=1
ro.ril.gprsclass=10" and added these in place. I go from the 3-5Mb/s to 7-10Mb/s for my area. Add these below in the same location of the build.prop where you removed the two lines:

ro.ril.hsxpa=5
ro.ril.hsupa.category=7
ro.ril.hsdpa.category=48
ro.ril.enable.3g.prefix=1
ro.ril.gprsclass=12
ro.ril.enable.dtm=1

Sent From My KickAss ATT SGS2 SPORTING CM7

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Click to collapse

+1 on these settings! I went from 4 dl and .5 ul to 6.5 dl and 1.7 ul. Awesome.

nismax said:

On the bottom of the build.prop

Send from my SG2-i777 using XDA Premium App

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hmmm

I tried these exact same entries and it actually made mine worse.

I went from
2.6 Down / 1.0 Up
to
1.4 Down / 0.6 Up

I wonder if placement in the file is incorrect, or something.

Maybe try putting them in the same place as I have them then. And make sure to delete out the other two lines if you have them or ANY of the same lines that you are copying.


Sent From My KickAss ATT SGS2 SPORTING CM7

Additional values should be placed in the "ADDITIONAL_BUILD_PROPERTIES" of the build.prop.

Additionally, you guys are setting values beyond the technical specifications for HSDPA and HSUPA. You can't set a value of 48 with HSDPA for instance, because that does not even exist, not sure where you got that information. Same goes for HSUPA. Setting values beyond the technical specifications will not gain you any results, as they either do not exist or the hardware is not capable of processing it.

Max HSDPA category for Galaxy S2 is 21.
Max HSUPA category for Galaxy S2 is 6.

ro.ril.hsdpa.category http://en.wikipedia.org/wiki/High-Speed_Downlink_Packet_Access
ro.ril.hsupa.category http://en.wikipedia.org/wiki/High-Speed_Uplink_Packet_Access
ro.ril.gprsclass http://en.wikipedia.org/wiki/General_Packet_Radio_Service

However, just because the device is capable of an HSDPA category of 21 it does not mean AT&T will allow you to run at those speeds. Also, your city may not support the speeds yet, so YMMV.

These are the correct settings for the build.prop:


This is all you need to set.

How much of an impact do you think cases have on speeds? I get wildly different results on multiple tests from the same location. Lastly, is there a HSPDA menu for the art sgh-i777? I wanted to try completely disabling HSPDA, 3g only never see h icon etc. Is that possible? International gs2 has a menu *#*#code etc. Thanks!

Sent from my SGH-I777 using xda premium

CyberpunkDad said:

How much of an impact do you think cases have on speeds? I get wildly different results on multiple tests from the same location. Lastly, is there a HSPDA menu for the art sgh-i777? I wanted to try completely disabling HSPDA, 3g only never see h icon etc. Is that possible? International gs2 has a menu *#*#code etc. Thanks!

Sent from my SGH-I777 using xda premium

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Click to collapse

The wildly different speeds are due to the app you are using to do the speed test and the fact that you will connect to any random cell tower at any given moment for your cell connection. You might route through a tower across the continent and your test will go against that, not very accurate.

My two cents

I'm on a i9100 running CM9 Codeworkx latest. My build prop was missing the ro.ril.hsdpa.category and ro.ril.hsupa.category lines. I added those just as described in OP and saw instant improvement. Tested a few times to be sure. Then went back to original and tested again. Same location same signal strenth, and the downloads were less. I tried some of the settings suggested on Page2 and things got worse. Set it all back one by one and best i can tell the hsxda=5 and hsupa=5 were the most important. But the hsdpa may be as well.
I know my numbers are crap, but this is why it is so important to me
With cm9 stock build.prop
DL runs about .51 to .68 mbps
UL runs about .31 to .52 mbps
with OP settings (I used hsdpa =25)
DL was 1.65 to 2.19 mbps
UP was .23 and .65 mbps

Also I'll point out that in the latest CM9 there is a setting in advanced that allows for UMTS/HSDPA/HSUPA but I believe the missing build.prop lines prevents it from working correctly.