Get solutions For No WIFI or Weak WIFI signal on iPhone 5S

Apple iPhone 5S WIFI function not working well, the trouble details are that the iPhone 5S no WIFI or the WIFI signal is weak. Here you can get solutions for these issues.

Check iPhone 5S circuit diagram in WUXINJI Dongle, we know that the C103_RF is the key point we need to check.

Use phone opening tools to disassemble the iPhone 5S , and then remove the iPhone logic board, measure the C103_RF by Fluke 15B+ Digital Multimeter to check if it has power supply.

If there is no power，we can solder a jump wire between C103_RF and C297. If there is a voltage，and the surrounding small parts are not lost, we can replace the new iPhone WIFI module IC U8_RF.

For iPhone 5S weak WIFI signal issue,  we can try to solve it by soldering a jump wire, it doesn't need replace the new iPhone WIFI module IC .

Gently scrape the black glue off the L48_RF with the S1016 BGA graver blade, use tweezers to remove the R13_RF, and use QUICK 861DW hot air rework station to solder a jump wire between L48_RF and R13_RF.

After soldered the jump wire, if the signal still not good, then we can try to solder a jump wire to antenna interface. If the signal still is poor, then we can replace the iPhone WIFI module IC.

After fix it, install the iPhone 5S and test it, the iPhone 5S WIFI function works perfectly.