Presently, Telecom masks are being planted in the residential areas,how can we measure the radiation effects of this mask against the residents.
Did you mean "telecon mast"? Like telecommunication towers right?
I think the most relevant reference is the work of Blake Levitt.
https://doi.org/10.1139/A10-018
As you may know, the electromagnetic radiation from Telecom masts is in the classification of RF energy and radiofrequency energies are non-ionizing radiation. So, the physics clearly suggests that EMR emanating from such stations poses no health hazards however long-term exposure remains an issue of contention. With this in mind, I assume this is what you intend to find out.
To answer your question more broadly, you may already know that there are 2 types of radiation effects to the body: deterministic and stochastic. And recently, some top organizations in cancer like IARC have come out to say that RF energy may be carcinogenic to the body though I haven't seen the data that led to that. So, the first thing to get is a radiation detector.
Scan the area and measure for background radiation.
Measure the mSV at several distances to and away from the telecom mask and compare your answer with standard values of radiation exposure limit.
If the values fall below with a clear statistical difference, then rest assured that such towers pose no threat to the human body, however, if the results are the opposite then you want to begin to evaluate the deterministic and stochastic effects by various methods.
But scanning the area of the specified mast should be the first preliminary data you should have.