Can I change Proximity Zones distance values?

Hi, I need to change those values, when it is Far, Near and Immediate, is it possible?

These are actually hard-coded into the iOS iBeacon API itself—so there’s not much we can do to make them configurable.

You could however measure the average values of the accuracy property (which is correlated with the distance from the beacon—i.e., the closer to the beacon you are, the lower the value of accuracy is) at a given distance from the beacon, and use that to trigger your actions when you want them. Note however that the accuracy values jump around quite much (because they are derived from signal strength, and that also jumps around due to physics of the radio waves) and can differ between e.g. iPhones and iPads. Treat them with a pinch of salt.