About two days ago I posted a forum topic about upgrading a relative's AT&T S4 here in Canada (Rogers Wireless). After a while, I was finally able to upgrade the bloody phone to 4.4 from 4.3 by following these two threads: I337UCUFNB1_100%_Stock_Rooted_ROM & I337_MK2toNB1_KeepRoot_OTA.zip and
I337_NB1toNC1_KeepRoot_OTA.zip & I337UCUFNC1_100%_Stock_Rooted_ROM(4/24/2014)
However I now have a problem with the Lock Screen Options, Removing Safestrap, and the Mobile Hotspot. First, when I go to set a PIN for the lockscreen, I only have the two options Swipe and PIN (which doesn't work at all but is an available option) while the rest have this message under them "disabled by administrator encryption policy, or credential storage". I've tried googling a fix but none of the fixes seem to work. It is said in the first thread posted above, that the MK2 bootloader users will experience a lockscreen settings issue but I can't apply the other bootloader provided that resolves the issue as it is stated that it may cause a hardbrick to the phone since I'm on the NC1 bootloader. I'm not sure what can fix the lock screen problem.
My second problem is removing Safestrap. Stated in the second thread above, there is a known issue that Safestrap will force close after updating to NC1, but Safestrap will continue to function normally after. I tried the method of manually uninstalling it by using ES File Explorer and tried deleting the safestrap folder under system/etc/ and the e2fsck file under system/bin/e2fsck, but I get an error that those files/folders can't be deleted even though I gave ES File Explorer root permission.
My third and final problem is the Mobile Hotspot that comes with the phone from AT&T. I tried to run the mobile hotspot today, but I get a message saying that Mobile data not available or Invalid SIM. I'm assuming since this is an AT&T Phone and AT&T is using their own software to override the System Default Hotspot Tether program, It doesn't let you run it without having a AT&T SIM. Is there someway to restore the System Default one that Samsung ships with it's phones and remove or disable the AT&T one?