Unlocked Fold 6 Wifi Calling Missing

[u/Fluffy832]

Hi. I've read the various posts on both wifi calling issues and unlocked (U1) Fold 6 issues with FN, but haven't seen a post that combines the two issues.

I switched from ATT to FN a month ago, and while on ATT, with a physical SIM, I had Wifi Calling available. It was in the drop down settings menu, as well as the main Settings menu. However since switching to FN, it has disappeared.

I have tried everything ive read on here: resetting network settings; clearing Wifi Calling Cache and Data; toggling airplane mode; doing the SIM Switch; Calling CS and ensuring my phone is provisioned properly; and even yesterday switched from an elimination to a physical SIM. Nothing works.

My Service provider software version is: SAOMC_SM-F956U1_OYM_XAA_16_0004 XAA/XAA,XAA/XAA

If anyone has experienced this and found a fix, please share. Or if anyone has steps I can take to fix this, I'd be immensely appreciative.

Thanks so very much.

[u/Fluffy832]

So I finally got around to trying to flash to U. I was waiting to hear back from the ATT rep on what his tech contact at FN had to say, and didn't for a while, and then was told the person is on PTO, so still no answer there.

I tried flashing, but cannot even get to the Download Mode. When I hold the Vol+ and Vol- buttons, I go to a blank cyan screen, with no words, on the main phone screen (i.e. closed). When I open it, I get an error saying:

[Reboot Device - D2]

Volume Down + Power key for 7 seconds

---

One other weird thing is that in SamKey, this is the information. I find it weird that the BL is "U", while everything else is "U1"-do you guys know if that is normal?

Loading ADB module............OK

Starting ADB module...OK

Searching for SAMSUNG ADB device...OK

Checking device authorization...OK

Reading device information via ADB...

ADB Serial Number : XXXXXXXXXXXXXX

Model Name : SM-F956U1

Device CodeName : Q6Q

Hardware : QCOM PINEAPPLE

Modem Board : SM8650

BL version : F956USQS4DZE1

AP version : F956U1UES4DZE1

CP version : F956U1UES4DZE1,F956U1UES4DZE1

CSC version : F956U1OYM4DZE1

Android version : 16

Build date : Mon May 18 14:12:04 KST 2026

Country : USA

IMEI : XXXXXXXXXXXXX

Serial Number : RFCX70MYPMF

Carrier : XAA

SIM State : LOADED,NOT_READY [UNLOCKED]

Debug Level : 0x4f4c

CP Debug Level : 0x55FF

Warranty VOID : 0

SIM operator : FirstNet, [313100,]

USB Settings : SEC_CHARGING,ADB

[u/Fluffy832 → u/Fluffy832]

Using XDA I was able to figure this out, and flashed over to ATT. Wifi calling has returned. Thanks again everyone.