Chosen Solution
i uploaded an edited 4s logic board i saw mine that that part is missing, thats why i have to sit next to the wifi router to receive signal. i think that is related to my signal issue. where can i find this missing part, is there any remedy for this? (jump, find that part in other devices except 4s because i dont have spare one, or the like) please help me, i really want my signal back. thank you.
angdummy123, that is reference designator FL10_RF which is a 2.45GHZ-1.8DB Band pass filter in a 0805 package. A Murata LFB182G45SG9B740 should work. Check the datasheet right here. It is a readily available part on here. Check the datasheet for the dimension. To replace it you will need some good tools and definitely a steady hand and a good magnification source. If you are really talented and know how to solder very small pieces you can apply a jumper (I prefer not to), check the attached image. Hope this helps, good luck.
