“I want everyone to realize the zchus you get when giving tzedakah while davening. Hashem sees that you are having rachmones on someone he will do the same for you.”
Not true. Firstly, neither you nor any other human knows what Hashem judges of an individual action.
Secondly, my davening is not what it should be if I am mafsik for anything (cell phone, collectors, or anything else). I have not clue what HKB”H thinks of it. My obligation is to fulfill the mandate of tefilla, as explained in Shulchan Aruch. For many parts of davening, there is no heter to be mafsik. If you are unsure of exactly what is included in this issur, check out sifrei halacha, or ask your Rov. Being pestered during megilla reading, during Shema, etc. is unacceptable.
Having tzedokoh collected in shul is not a bad thing. It has gone on for centuries, and many tzaddikim spoke of the wonderful zechus inherent in this. However, it does not change the halachos about where one may not be mafsik. The reason we are discussing this is because the matter has gotten out of control in many shuls, and we are perplexed how to resolve this without banning tzedokoh collections altogether.