メインコンテンツにスキップ

iPhoneの5代目となるiPhone 4S。このデバイスの修理は比較的簡単で、スクリュードライバー、開口ツールと忍耐が必要です。GSM/CDMA / 16, 32, 64 GB / 白と黒

3002の回答 すべて表示

Poor wifi signal - not "greyed out"

Hi there,

I looked everywhere for any answer, but didn't find any solution. My iPhone 4S gets very poor wifi reception. I'm able to connect to my router only when I'm literally next to it.

I changed the wifi flex (top right corner), tried cleaning EM shield with alcohol and tightening it's screws.

The phone is not new, and the screen was most probably changed - some screws were missing.

Anyway, which parts (even tiny) and screws are anyhow related to to wifi signal strength? Which part/s of the phone work as a wifi antenna? What else can I try to do to fix it?

Thanks for any advice.

この質問に回答する 同じ問題があります

この質問は役に立ちましたか?

スコア 7
コメントを追加

PCラップトップ用バッテリー

iFixitの品質保証付きトップPCブランド用バッテリー

ショップを見る

PCラップトップ用バッテリー

iFixitの品質保証付きトップPCブランド用バッテリー

ショップを見る

6回答

最も参考になった回答

Tighten this screw if loose will weaken wifi

Block Image

この回答は役に立ちましたか?

スコア 2

コメント:

This probably wont help - I replaced the wifi flex with a new one and tighten it really well. I will try to clean it with alcohol.

による

The first cable you replaced was the wifi part the second located on the speaker is not is a cellular antenna as an experiment on my own 4s I removed the cable completely and wifi was still at full strenth so the lower antenna does not affect wifi..

Myth busted

による

well give the sheild a shot and replace it but dont have high hopes as it wouldnt cause weak wifi.

have a 4s at home here and have removed that part and wifi is still at full strength .

i no in the iphone 4 the wifi sheild is a must for strong wifi but not the 4s

による

well give the shield a shot and replace it but don't have high hopes as it wouldn't cause weak WiFi.

have a 4s at home here and have removed that part and wifi is still at full strength .

i no in the iphone 4 the wifi shield is a must for strong wifi but not in the 4s

による

I give up. Replacing of the EMI shield didn't help either. Probably last thing I can do is disassembling the whole thing, cleaning it with alcohol and reassembling using new screws. :)

による

表示する 1 他のコメントを

コメントを追加

I don't think it will make a difference if you have the sticker or not but I couldn't say that for sure.

The only other thing I can suggest if you have tried everything else is to see if you have tightened the screw as in the first suggestion and to replace the wifi emi shield.

I messed about with my iPhone yesterday with the bottom speaker part to see if it had any effect on the wifi and it would appear that it is actually just related to the antenna and not the wifi as I first suggested. This is really weird as this fix has always worked for me in the past but I guess I must have just been lucky.

If it still doesn't work then it may be that there is a fault with the wifi chip or you may have a blown capacitor?

I've also heard that if you clear the cache, cookies etc on the phone (under settings) then this sometimes helps but I've not tried that myself so don't know if this will make a difference or not.

Anyway, at this point it would be a good idea to change the wifi emi shield to see if that helps (I've included a photo for you so you know which part it is). If it still doesn't work after that then I would say that the board has a fault.

Block Image

この回答は役に立ちましたか?

スコア 1
コメントを追加

This good tutorial "How to Fix the iPhone 4S Wifi Problems After iOS 7 Update" may help you http://www.etradesupply.com/blog/how-to-...

この回答は役に立ちましたか?

スコア 0
コメントを追加

"I do know which parts are wifi related as it's the parts that I told you about already (I fix iPhones for a living so I know what I'm talking about)."

Clems you do realise the first picture that you posted is of an iPhone 4 battery connector not the 4s don't you?

この回答は役に立ちましたか?

スコア 0

コメント:

The pictures are from the iFixit 4S teardown so if anything is wrong with them it's not down to me. Also, as I said after my comment, the actual part I have shown in the 1st picture doesn't relate to the wifi issue as I originally suggested (I was getting confused with another topic - that will teach me to try to answer 2 questions at once!). :)

による

Hi Eddie, I replaced 3 iPhone 4s screens , and I noticed that on the inner ( right) screw of the EMI SHIELD and its base came loose ( we are talking about the very little screw on the EMI SHIELD that is over the screen flex connectors . I couldn't "glue" the base for the screw so I took it away. Since then very poor wifi signal , unless I am in the same room of the router.

Any suggestions?

による

コメントを追加

Check to see if you accidentally pryed up the soldered connection, these are the usual symptoms. you can actually press it back into place without resoldering and wifi will work ONLY when you're next to the router,

この回答は役に立ちましたか?

スコア 0
コメントを追加

you fixed the wifi problem?

この回答は役に立ちましたか?

スコア 0

コメント:

Unfortunotely not. I think i tried everything except for changing the wifi IC. Then I decided to move on and buy a new phone. :)

による

コメントを追加

回答を追加する

Vasek さん、ありがとうございました!
統計データを表示:

過去 24時間: 5

過去 7 日: 6

過去 30 日: 20

今までの合計 25,955