Originally Posted by prboy1969
Just a bit more info. A fellow member of the Assist Team has pointed something out to me regarding your issue. It was mentioned, that it is very important on T-Mobile to make sure that your APN is set to " FAST " . Otherwise your data will be slow, or none at all. A quick search came up with THIS THREAD. Also be sure to write down your current APN settings where you can recall them. Or better yet take a couple of screenshots of your current APN's , and save them to the PC / Laptop. Or anywhere other than the device, as a CYA measure. Remember always read, read, read, and re-read all information before proceeding.
Did the following today:
Contacted T- Mobile and requested a Reset from their end AND inquire if a U.S. specific Modem file exists for the I9305.
Downloaded from two of the sites you referred me to, some 20 Modem files.
Using Odin, installed five of them.
They all worked about the same with no real difference or improvement.
Restored the Modem file that came the OS firmware.
Checked the APN site you mentioned and tried all sorts of various combinations including adding a dash to tmobile and using FAST.
Nothing made a difference.
Am now back on APN default setting, the phone will remain on for three days that T-Mobile said it needs to do its configuring.
It seems to me that the modems for this phone are all based on non U.S. standards and even if a U.S. modem exists or can be built and used, it might not make a difference if the issue is hardware based, which is something that cannot be readily changed, if at all.
What is hard to fathom is that the phone indeed, does work in 2G, but so unbelievably slowly, have to suppose, some other factor, that we have not addressed, is causing a bottleneck. Why would Samsung make a phone and T-Mobile
offer a network that they knew would only operate at a 2G speed of 0.12 mbps? That makes no sense.
Will await the Reset outcome, also anticipate an upcoming Android firmware update to 4.4 and will keep looking for an answer.
If all else fails, will then consider another carrier or another phone, but not giving up yet.
Your continued interest is really appreciated!