i have self tracker in my car, and i am totaly satisfied with it. It has anti jamming function. Its total piece of mind, baqi cheezoun ka hifazat ALLAH ke hath mae hay. I paid only 1 time cost, there is no annual or monthly fees.
I installed it from one company in rawalpindi, if any body want information he can call them. Mr. Shahzad was there at that time. 0300-5251002