[Galaxy S 4 Mini General] redjamesg:
This thread is mainly created because the previous thread by [MENTION=3027165]spitya[/MENTION] seems to be abandoned, and several users have expressed their desire that I would keep these modems in a separate thread.

It also serves the purpose that I can keep the OP updated with the desired info, instead of referring to some post buried deep in the thread.

Disclaimer:

/* Your warranty is now void.
*
* We are not responsible for bricked devices, dead SD cards,
* thermonuclear war, or you getting fired because the alarm app failed.
* Please do some research if you have any concerns about features included in this procedure
* YOU are choosing to make these modifications, and if you point the finger at us
* for messing up your device, we will laugh at you.
*/

The files made available here are extracted from the official Samsung Firmware made available from SamMobile website, it will save you from downloading in access of 800MB of data with average download speed of 15KB.

Mainly it will be firmware specified for the EU market, as I am located here and will be using these firmwares, if you want your specific region included, I would appreciate if you would make sure to make the files available as they become updated for your region, since I don't intend to waste time on something I am not going to be using.

Since I intend not to delete any of the files, it is also essentially a resource with all the different Modem versions released.

User Guide:

Under Windows using Odin:

Extract latest version of Odin to your computer.

Install Samsung Mobile Phone Drivers for Odin to find your device.

Boot your phone into download mode, by pressing [Volume down] + [Home] + [Power]

- Once you reach the Download mode warning screen, press [Volume Up] to continue.

Open Odin

[1]Connect phone and wait until you get a blue sign in Odin

[2]Place the desired modem file in the [AP] slot.

[3] Go to the Options section and make sure Auto Reboot, Re-Partition and F. reset time are unmarked.

[4]Push [Start]

Once odin reports "Success..." message in the Message box, boot your phone into download mode once again and repeat step 1 - 4 once more.

Under Windows/Linux using Heimdall:

Under Windows disregard the sudo part of the command, You can use 7zip to extract the contence of the modem.

Get the latest version of Heimdall, if you are using one of the Debian derivatives you can install the distribution package heimdall-flash

Extract the modem tar.md5 file using the command

tar -xvf I9195XXUCOG1.tar.md5​

Boot your phone into download mode, by pressing [Volume down] + [Home] + [Power]

- Once you reach the Download mode warning screen, press [Volume Up] to continue.

Connect your phone using a proper USB cable

See if your phone is detected using the command:

sudo heimdall detect​

Flash the modem files using the command:

sudo heimdall flash --no-reboot --MODEM NON-HLOS.bin --TZ tz.mbn --RPM rpm.mbn --verbose​

Reboot your phone into download mode once again, and flash the modem a second time.

The modem found here is only working with Samsung Galaxy S4-mini (GT-I9195), it will not work with any other variant of the S4-mini.

Weather the latest modem gives you a boost in signal is very depending on your location and provider, the best advice is to try a few different modems and select the one you feel works best in your case, how ever it is recommended to use the latest since it contains the last security fixes from Samsung.

File versioning:

Some of you might be unaware of how the Samsung versioning of the Modem is layed out, I will try to give an accurate description of what is what in the versioning.

The filename displays the version as I9195XXUCOG1, the layout of the versioning is as follows:

I9195 - Identity of the phone supported

XXUC - Identity of location [XXU] - European location (Unbranded)

O - Year of version (here 2015)

G - Month of version (here 7.th [July])

1 - Compilation number, goes from 1 - 9 and A - Z

Download section:

EU (Nordic)

Latest Modem: I9195XXUCQL2

A collection of the modems are available from AndroidFileHost