WIFI signal is weak, which part should I replace

None of those.

First you have to tell us if the wifi is 2.4G or 5G, they use different antennas.

I have replaced the F Cable antenna and it does the job, Wifi is running at full strength.

You can buy from eBay for cheap just for $2-3 only. Does not have any quality issue.

F Cable Antenna

I know this doesn't really answer your question, but is the phone still under warranty? I would try to get a new phone under warranty before replacing any parts with your own coin.

Basically if your wifi is greyed out then it's a problem with your wifi module on the board. If the signal is weak its either an antenna issue or a software issue....or a communication problem with your router.

I corrected this problem recently. The first repair shop replaced the customers damaged chassis with a used one. This is when the 2.4GHz signal evaporated just as described. After I got the device history, I replaced the chassis with a nice straight one and that corrected the 2.4GHz signal problem. If you're 5GHz signal is strong, it's not likely to be the F-cable. You can further narrow it down by testing GPS and BT which use the same antenna. If they both work well, it's probably a bent chassis.

Flexing the frame brought the wifi back for me too.

I applied pressure with my thumbs one on corner by wifi icon and other thumb diagonal corner.

I supported other corners in the back with my fingers.

Hold the phone like you watching a movie:)

It works!!!!! Yeah !!!

I'm so proud, I have to brag to someone! Hopefully I can help someone too. First, my backgroun: I'm a 49-year-old mom. I drive a Subaru station wagon, for God's sake. I have no tech background, but do admit to a DIY gene I got from my dad.

Anyway, both of my kids' iPhone 6 phones started getting little to no wifi connection. They could maybe get three bars directly next to the router, but as soon as they moved away, they'd lose it. I bought a GPS Antenna Signal Flex Cable Ribbon Replacement Part for IPhone 6 (4.7'') for $4.90 (actually, I bought two, hoping to fix both phones...glad I did, because one came defective and I didn't look to find out until I had the phone completely open and dissected. Maybe order two, since they're cheap, just in case) and a $7.99 tool kit off Amazon, and fixed it!! I followed two different youtube videos, but ultimately only needed this one...there are a bunch, though. The phone works perfectly with a strong-as-new wifi connection!

Notes:

1) The first video I used ended after removing what the instructions called "wifi receiver" and I thought, "F*&K!" thinking I had ordered the wrong part. But the second video went on to remove that part, calling it the "cover" and the "mother board" to reveal and replace the antenna, which looks sort of like an "F." This is the only part I replaced and it worked to restore the wifi signal completely.

2) There are roughly one million screws ;) to remove, and they're minuscule. I drew pictures (using #s to track the order in which I removed the parts, and labels) and also took pictures and used the "mark up" editing tool on my phone to make notes. It wasn't pretty, but there's no way I would have been able to put the phone back together had I not done that. The hardest part was removing two stripped screws...I found a youtube video with hints for how to remove those too...finally I did it with a combo of the tools I bought and tweezers (which the tool kit doesn't come with, and I recommend having). Altogether, I watched the videos on my iPad, used my phone to take pics, and used a pen and paper for notes and laying out screws by my labels. I also used a really bright bedside/task lamp, my reading glasses, and a glass of wine!

I think this is all of the hints I have. It's a little scary, and there are some connectors that are so tiny, it's amazing you can snap them back on (like the battery connector), but you just have to go for it. If your phone doesn't get wifi anyway, and you don't have unlimited data, I'd go for it! It took me two hours (would have been 1.5 if it weren't for the stripped screws). Good luck!

i have the same problem. i cannot see 2.4ghz wireless networks. I changed many components including f tri chip on the 2.4ghz antenna line. still weak. my last resort is replacing the wifi chip. Any suggestions would be appriciated. i also check up top near the standoff screw where small silver antenna connect to phone frame. all inductors and caps have been replaced including f tri chip.

Did You Repair It? Im having The Same. Problem For Ages

I have the same problem.

what can we do?

Is there a solution?

I tried to do this, but it did not work anyway

My problem is

2.4GHz Wifi - does not work - weak signal - need to stay near the router

5GHz Wifi - works perfectly - full signal - even away from the router

Bluetooth - does not work

I dropped my phone and it started having this problem on both my work and home networks, so I knew it was probably not the router.

After reading David Rowe's response above I flexed the phone in a few different ways and the signal popped right back to full strength!

Worth a try...

I replaced both parts i own an iphone 6, and after i replace both parts the phone started working just like new, i would recomend to try it, now both the wifi signal is super strong, and the gps is pinpoint accuracy, change both parts, you can find it cheaper on ebay

I had this problem too, and I was trying all of these complicated solutions I was finding on the internet. In the end l, however, it ended up being my new phone case blocking signals on my phone. Take off your phone case and see if it makes any difference.

Here are the tips on how to boost WiFi signal on iPhone using DIY WiFi Booster techniques that work and most useful: https://www.howtoisolve.com/how-to-boost...

Thanks for wifi antenna replacement helped me..