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1. • 1234# and look at the CSC entry

     • Your device should use O2 firmware if you bought it direct from us in an O2 shop, online or over the phone. To check if your phone’s running O2 firmware, dial *#1234# and look at the CSC entry. If this line includes ‘TEF’, ‘O2U’ or ‘OTF’ then your device has O2 firmware and you can set up Wifi and 4G Calling.
     community.o2.co.uk/t5/Android/samsung-galaxy-20A51-20firmware/td-p/1461265

     Solved: samsung galaxy%20A51%20firmware - O2 Community

2. community.o2.co.uk › t5 › AndroidSolved: WiFi and 4G calling, O2 firmware - O2 Community

   community.o2.co.uk › t5 › Android

   • Cached

   Dec 7, 2018 · My samsung s8 plus doesn't seem to support Wifi and 4G calling, I think this might be because I dont have O2 firmware. How do I get O2 firmware?

3. community.o2.co.uk › t5 › AndroidSolved: samsung galaxy%20A51%20firmware - O2 Community

   community.o2.co.uk › t5 › Android

   • Cached

   May 23, 2021 · To check if your phone’s running O2 firmware, dial *#1234# and look at the CSC entry. If this line includes ‘TEF’, ‘O2U’ or ‘OTF’ then your device has O2 firmware and you can set up Wifi and 4G Calling.

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5. community.o2.co.uk › t5 › AndroidSolved: Firmware Upgrade - O2 Community

   community.o2.co.uk › t5 › Android

   • Cached

   Jun 25, 2018 · I need to have O2 Firmware as I have poor reception where I live and rely on the WiFi calling feature. I have been over to Sammobile but am unsure which download I should choose. My phones model number is: SM-N950F

6. www.o2.co.uk › help › network-coverage-andHow to enable WiFi and 4G Calling – Help and Support | O2

   www.o2.co.uk › help › network-coverage-and

   • Cached

   To check if your phone’s running O2 firmware, dial *#1234# and look at the CSC entry. If this line includes ‘TEF’, ‘O2U’ or ‘OTF’ then your device has O2 firmware and you can set up WiFi and 4G Calling.

7. www.gsmfirmware.net › 2020 › 09How to Find Correct Firmware for Samsung Device?

   www.gsmfirmware.net › 2020 › 09

   • Cached

   A complete explanation, a professional way for beginners to find the exact firmware file that is compatible with the Samsung device.

   Country	Csc (country Specific Code) Codes
   Afghanistan	AFG
   Algeria	TMC, ALG, ALR
   Austria	ATO (Open Austria) AOM, DRE (3 ...
   Albania	AFV (Vodafone)

   See full list on gsmfirmware.net

8. xdaforums.com › t › q-where-can-i-download-o2[Q] Where can I download O2 Branded Firmware - XDA Forums

   xdaforums.com › t › q-where-can-i-download-o2

   • Cached

   Aug 16, 2011 · I have recently flashed my Samsung Galaxy S2 with KE7 update which debranded my phone. Then I searched an O2 branded firmware from this website but after flashing my phone with this firmware, I am having two problems.

9. People also ask

   How do I know if my device has O2 firmware?

   • If this line includes ‘TEF’, ‘O2U’ or ‘OTF’ then your device has O2 firmware and you can set up Wifi and 4G Calling. If the CSC doesn't include one of these codes then Wifi and 4G Calling isn’t supported on your phone right now.

   Wifi calling on Samsung S20+ - O2 Community

   community.o2.co.uk/t5/Android/Wifi-calling-on-Samsung-S20/td-p/1321768

   See all results for this question

   How do I know if my phone is O2?

   • To check if your phone’s running O2 firmware, dial *#1234# and look at the CSC entry. If this line includes ‘TEF’, ‘O2U’ or ‘OTF’ then your device has O2 firmware and you can set up Wifi and 4G Calling. If the CSC doesn't include one of these codes then Wifi and 4G Calling isn’t supported on your phone right now.

   Wifi calling on Samsung S20+ - O2 Community

   community.o2.co.uk/t5/Android/Wifi-calling-on-Samsung-S20/td-p/1321768

   See all results for this question

   Does a J3 (2017) need O2 firmware?

   • If you are using a J3 (2017) to get WiFi and 4G Calling, your device will need to use O2 firmware. This is essentially the software that makes your device turn on and run. Sometimes there are different versions of firmware for the same device.

   How to enable WiFi and 4G Calling – Help and Support - O2

   www.o2.co.uk/help/network-coverage-and-international/wifi-and-4g-calling

   See all results for this question

   Does my Sony XZ need O2 firmware?

   • If you are using a Sony XZ Premium, XZ1 or XZ1 Compact, to get Wifi and 4G Calling, your device will need to use O2 firmware. This is essentially the software that makes your device turn on and run. Sometimes there are different versions of firmware for the same device.

   How to enable WiFi and 4G Calling – Help and Support - O2

   www.o2.co.uk/help/network-coverage-and-international/wifi-and-4g-calling

   See all results for this question

   Does O2 support WiFi or 4G Calling?

   • With O2, WiFi Calling means you can make calls when you don't have signal. Meanwhile, 4G Calling offers better indoor coverage and clearer calls using our 4G network. But how do you know if your device is supported? What do you need to do to enable WiFi or 4G Calling? And where can you use it? Our guide has the answers. What is WiFi and 4G Calling?

   How to enable WiFi and 4G Calling – Help and Support - O2

   www.o2.co.uk/help/network-coverage-and-international/wifi-and-4g-calling

   See all results for this question

   How to find a firmware file compatible with a Samsung device?

   • It is imperative to know, such as the mobile model number, and binary number. Below is a list of information that we need to know before looking for a firmware file compatible with a Samsung device: Model Number. Binary Number. CSC (Country Specific Code). Date of Release and Revision. How Do You Get the Required Information from Your Phone?

   How to Find Correct Firmware for Samsung Device?

   www.gsmfirmware.net/2020/09/find-correct-firmware-for-samsung.html

   See all results for this question

10. android.stackexchange.com › questions › 112561How to find out firmware - Android Enthusiasts Stack Exchange

    android.stackexchange.com › questions › 112561

    Jun 16, 2015 · For Sony, Samsung and Motorola devices you can find in Settings > About phone > Build Number. If you have a Samsung device you can also check the version of firmware you currently have by dialing *#1234#.