I've updated my baseband version from the old one dated November 1st 2013 to new one dated February 15th 2014. I extracted it from the new 1.0.1 firmware (the one working at 900/2100). I was hoping I could have 900Mhz too, but I'm without luck. BT/WiFi/GPS/NFC are all working ok, so I will keep it anyway. Maybe some settings are stored in NVRAM, and maybe there are hardware changes too? What do you guys think about that? If someone knows where to get from or can make backup of his own NVRAM on new 1.0.1 version, I would appreciate if it can be uploaded somewhere.
If you want to update your baseband, first download a new baseband version from
[Only registered and activated users can see links Click here to register], so you don't have to download a complete v1.0.1 rom, and screw around with unpacking system.img file.
After that, just unpack the archive and copy modem_1_wg_n.img from v1.0.1\system\etc\firmware folder into your \system\etc\firmware folder on your phone, and confirm the overwrite. Ofcourse, your phone must be rooted, and you should install one of the more advanced android file managers (like Solid Explorer or Root Explorer), so you copy the file into your /system, and afterall change the file attributes, owner and group to what the system expects (all of that must be like the original .img file had before, because new .img file gets some default properties which are not ok in our case).
The file should have file permissions like on the screenshot below (-rw-r--r-- 644), and owner/group must be set to root.
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After that step, reboot your phone, and keep your fingers crossed
After all is settled down, go to Settings/About phone, and you should see your baseband version is updated.
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The original .img file can also be found in v.1.0.7 folder if you by any chance want to go back.
I guess I don't have to mentition, but will do it anyway: you do all of this at your own risk! If something bad happens, well, that's just sad. I'm not held responsible for anything. It works perfectly on my phone, but your mileage may vary.