iOS City-Level Location Spoof

I want my iPhone to appear as though it is in a different city than where I actually am, primarily for privacy. I have not decided whether the spoof should stay in place indefinitely or only be switched on when needed, so I am open to your guidance on the best approach.

Ideally, you will set up a reliable method—whether that involves a developer profile, a hardware GPS simulator, a jail-broken solution, or another proven technique—that lets me pick a specific city and have every location-aware app on the device reflect that change. The end result should survive typical reboots and iOS updates unless we agree that a lighter, temporary method better suits my use case.

Please outline:
• The technique you recommend and why it is the safest for privacy.
• Any tools, software, or certificates you will install or require from me.
• Clear steps I can repeat should I need to switch cities or revert to my real location.

If your method needs regular maintenance, let me know the frequency and what that upkeep involves. I am using the latest public iOS version, but can downgrade or keep to a specific build if this makes the solution more stable.

Looking forward to your proposal—especially if you have demonstrable experience spoofing location at the city level on non-jail-broken devices.