GCF settings - Applicability

Some phone models requires GCF settings to be applied in order to complete the unlock, below is the list. You may also need to use this feature in order to open the service menu. To access it you can either tap on "GCF Settings" button on the main screen (Fig. 1), or access such setting from the three dots menu button on top right of the app and then tapping on "GCF Setting" menu item (Fig. 2).

Please follow these steps only if you will use a GSM SIM (e.g. T-Mobile, AT&T etc...), in case you will use another CDMA SIM (like Verizon for example) then skip these steps.

If you applied GCF Setting and you want to revert it in order to use a CDMA SIM (to return back to Sprint for example) just follow the same steps but chose "GCF OFF" or "SETTING CANCELLATION" instead in the latest selection.

If your phone needs the GCF settings to be applied please open such menu using one of the two below ways (Fig. 1 or 2).

GCF Settings 01GCF Settings 02

Models that require GCF Settings

MEGA SPH-L600

Note 3 SM-N900P

Note 4 SM-N910P

Note Edge SM-N915P

S4 SPH-L720

S4 Triband SPH-L720T

S5 SM-G900P

S5 Sport SM-G860P


If your phone is rooted you will see the Service Menu direclty (Fig. 3).
If your phone is NOT rooted you will see the IOTHiddenMenu (Fig. 4), tap on TestMode Menu to open the Service Menu (Fig. 5).

Service Menu 01IOTHidden MenuService Menu 02

From Service Menu follow the steps below related to your phone model.

1. GCF settings for Note3, Note4/Edge, S5, and S5 variants

Tap the GCF Settings Button or tap on the app menu, then tap on GCF Settings dropdown menu item, then tap on these options in the following order:

[2] UE Setting & Info >

[1] Setting >

[1] Protocol >

[4] GCF >

[1] GSM/(E)GPRS/WCDMA GCF ON

It will say "success", please reboot via the phone’s power menu after the confirmation.


NOTE: To turn GCF OFF please select [2] CANCEL SETTING (GCF OFF) as last option.

2. GCF Setting for Mega, S4 and S4 Triband

Tap the GCF Settings Button or tap on the app menu, then tap on GCF Settings dropdown menu item, then tap on these options in the following order:

[1] UMTS >

[1] DEBUG SCREEN >

[6] PHONE CONTROL >

[7] NETWORK CONTROL >

[1] GCF >

[1] GSM/(E)GPRS/WCDMA REL8. (This item set GCF ON).

It will say "success", please reboot via the phone’s power menu after the confirmation.


NOTE: To turn GCF OFF please select [5] SETTING CANCELLATION as last option.