As to whose prayers God hears...been discussed many times on JWN, so many jws including me slept through this at the meetings, eventually we wake up.
*** w90 5/15 p. 12 par. 11 Fear Jehovah, the Hearer of Prayer ***
Everyone who really fears Jehovah is a believer who makes a dedication to God and symbolizes it by getting baptized. (Acts 8:13; 18:8) And only baptized believers have an unrestricted privilege of approaching the King Eternal in prayer.
*** w63 5/15 p. 319 Questions From Readers ***
It also appears that not a few who for some time were progressing toward dedication are now holding back from taking that step. Yet they continue to associate with God’s people and to serve with them. If it is selfishness that is holding them back, if they cannot find it in their hearts to give themselves in complete dedication to God, they may well ask themselves if they still have the privilege of prayer. Apparently not, because those who approach God must be earnestly seeking him. Such should also note that only those seeking Jehovah, righteousness and meekness, those dedicated and earnestly carrying out their dedication, may hope to be hidden in the day of Jehovah’s anger.—Heb. 11:6; Zeph. 2:3; Luke 13:24.