[Q] Download speed and modem problem - Galaxy S II Q&A, Help & Troubleshooting

So, I am having a lot of troubles with download speeds after updating on my phone. I tried putting KH3 on my phone, and it worked, but I was having issues with download speeds over the network, I went from 9mbps down/3mbps up while running stock bell KG2 to 4 mbps down/3mbps up while running KH3. I also noticed that it would constantly switch between 3G and H+. So then I flashed the original bell modem back onto it, but I'm still experiencing slow speeds, and it is still switching between 3G and H+. I then also tried disabling fast dormancy, and it is still giving me same problem
I then reflashed it back to stock bell KG2, and everything seems to work fine, and the download speeds are back to normal, and is staying connected to H+! I then tried flashing to KG5, and then I noticed the exact same thing happening, my download speeds were terrible again and was switching back and forth from 3G to H+. I then tried flashing the stock bell modem while running KG5, and again, download speeds are crap and it keeps switching between 3G and H+.
Any help would be greatly appreciated!

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changing between 3g and h is quite common in soon areas but if you want to turn it of you can go into settings-wireless and network-mobile networks.There you will see "network mode".Select that to choose the option you want.When its changing between 3 and h then its obviously set to auto by default.As for your download speed try to see if you are on the correct csc setting as csc settings are region based.Mark *#272*IMEI# on your phone and choose your countries csc.Sometimes when you flash a rom it might not give you automatically the one you want.For example im in spain so i need FOP but some times buy default KOR (korea) is set.Also dont forget to do wipes and re-sets after a flash to avoid any type of problem and also battery calibration as old rom info can be stored in the battery stats.

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DavidB88 said:
I was having issues with download speeds over the network, I went from 9mbps down/3mbps up while running stock bell KG2 to 4 mbps down/3mbps up while running KH3.
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Whoaa, that is what I wanted to test also. I have no idea how I can download a file from Internet, those Internet speed tests are just not accurate IMO. Anyways, I performed a test on my KH3 and I get speeds like:
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cooza said:
changing between 3g and h is quite common in soon areas but if you want to turn it of you can go into settings-wireless and network-mobile networks.There you will see "network mode".Select that to choose the option you want.When its changing between 3 and h then its obviously set to auto by default.
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I thought this is the fast dormancy feature, that allows you to rapidly disconnect from the network once the information is sent or received. That will penalize the actual network you are on, unless the carrier network and your phone talk to each other in a way that takes battery life as well as network congestion into consideration. For this to work, both networks and smartphones have to implement a standardized version of the fast dormancy feature. Bell Canada supports this feature and by default Fast Dormancy is enabled into XXKH3 firmware.
As soon as the speed test/download is done, my phone switches to 3G. This is the proper/intended way to save you bandwidth usage. Not sure on what kernel you are but flashing back the stock kernel does solve a ton of issues, including the GPS pinpoint.

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Hey guys...
Can anyone can tell me how to flash modem
Sent from my GT-I9100 using XDA App

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koolshubh said:
Hey guys...
Can anyone can tell me how to flash modem
Sent from my GT-I9100 using XDA App
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Click to collapse
As long as the file is compatible, use Odin under "phone" section.

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@yqed
sweet.I didnt realize that each firmware had a different default of fast dormancy.ive flashed a few now and all have been the same with FD active so inter-changeing between the two although ive never done kg2 to tell you the truth.I thought that it was active by default with all firmwares.Good to know anyway.cheers.