How do you edit APN settings on LS991 stock and sim unlocked on ZVF...NOT ROOTED?

[poog]

Have a Sprint LG G4 on ZVF....not rooted.

I am sim UNLOCKED.....(UICC unlocked) .

As far as I know I can put ATT and T-Mobile sims.......and these automatically work without editing anything.

But I want to use some other sims that require editing the APN manually.

Haved tried shortcut master.....doesn't work.

Anyone else have any clues? Thanks