When reassembly - take care with flat cable, which might be pushing connector to side. If so - I found easy to put connector in place before tightening screws on step 23 and 22. Because then logic board can move a bit when repositioning connector and to slide right place before connecting it properly.

Thank you very much for these instructions, which are aircraft maintenance quality. I had 2 phone: one with broken front glass and bad battery but with 32G. Other one good conditions but only 16G, which left over after getting 5s. So I changed logic board assembly from 32G to other frame and left all the rest inside. Voila, there it is fixed 32G 4s phone ready to use after recharging battery.

Instructions are so good that it takes me about 1 1/2 hour to disassembly and reassembly 2 phones and I had´t done that ever before. I just read instructions first and then followed step by step and checked out comments.