This is a portable phone mobile jammer which is used in army. Its now used in Dhammakaya Temple congregation. To use it, user must stay within crowded people. When jammer attacks phone signal, it will send interfere signal. Phone users might feel unstable signal.
To avoid this jammer, if you still have internet signal but slow, remove yourself from crowded people. If you can’t, we can’t leave from our temple, its possible to use internet by setting your phone to 3G then turn off and on. If it is not succeeded, it means that signal is deaden by mobile operators.