Iphone 5 gsm network issue after rear camera replacement - Page 4 - GSM-Forum

haseebrehman · 12-11-2014, 00:37

hi Sandy
i had same problem and fixed , i remembered that i changed top dual screw antenna flex also changed the antenna cable near the vibrator and left phone with WiFi connected (a 100% working sim card was inside) also 6 pins of sim reader lift slightly upwards and cleaned them with alcohol pads.
Try all These steps hope you will get good results.
Thanks,.

sandy2626 · 12-14-2014, 20:37

Quote:

Originally Posted by laptopmd

NO NO NO !! Don't jump capacitors if you don't know what you are doing !!

C367 is on PP_VBATT line, you jumped the battery to ground !

C367 is only a leveling capacitor, you can leave it removed, no need to replace to make the phone working. But it does nothing for the gsm signal.

Ok ok as what is the problem ??

sandy2626 · 12-14-2014, 20:43

Quote:

Originally Posted by haseebrehman

hi Sandy
i had same problem and fixed , i remembered that i changed top dual screw antenna flex also changed the antenna cable near the vibrator and left phone with WiFi connected (a 100% working sim card was inside) also 6 pins of sim reader lift slightly upwards and cleaned them with alcohol pads.
Try all These steps hope you will get good results.
Thanks,.

Hi haseebrehman
For the 6 pins of sim reader I don't know, I never tried that and I will try, but for the others solutions I have put my MB in a good fully housing and nothing was changed.
For the sim card reader the phone recognizes when I insert a simcard is that not suffisant to attest that this part is good?
Thanks for help it is important for me to solve this issue.

sandy2626 · 12-17-2014, 08:21

Hi all
What is the c1712rf ?vit is missing also in my pcb !
Please who knows that ? Laptopmd ?

sandy2626 · 12-17-2014, 10:50

Sorry but it is the C366 that is missing and not the C367.
As please C366 and C1712rf what are they doing ! Are they working for the GSM signal ?
What i must do for replace those parts?
Thanks

laptopmd · 12-17-2014, 15:22

Quote:

Originally Posted by sandy2626

Sorry but it is the C366 that is missing and not the C367.
As please C366 and C1712rf what are they doing ! Are they working for the GSM signal ?
What i must do for replace those parts?
Thanks

C1712_RF act as bypass filter together with L1710_RF but i think that gsm should work even without this cap. but check if you have continuity on L1710_RF, maybe if one component is missing, the other is damaged.

C366 is another Battery Voltage filter, doesn't do nothing for the GSM.

You say that this has happened after replacing the back camera, can you take a zoomed picture of this area ?

sandy2626 · 12-17-2014, 22:22

Here some photos.
Thank you for time you give.
https://www.dropbox.com/sc/9lsqujj6r...Mi6ZgBXVeBFC2a

sandy2626 · 12-18-2014, 23:18

Hi
Did you see the pictures ?what do you think?

laptopmd · 12-18-2014, 23:21

Quote:

Originally Posted by sandy2626

Hi
Did you see the pictures ?what do you think?

It appears that the components are fine..

Are you really sure that gsm worked before changing camera ??

sandy2626 · 12-18-2014, 23:48

Also i have eared thet the place of screws is very important. I think that it is important to very this. How can i know if all screws are in their good emplacement ?

sandy2626 · 12-18-2014, 23:49

Quote:

Originally Posted by laptopmd

It appears that the components are fine..

Are you really sure that gsm worked before changing camera ??

Yes i am sure i have used it with the faulty camera before replace it.

qwertybasse · 12-20-2014, 22:34

Do you have imei? can you check if your imei is stolen/lost/blocked ?

If you dont have imei (N/A) then you have problem in baseband unit

sandy2626 · 12-21-2014, 00:56

Hi
Yes the iphone has a clean IMEI no lost no stolen i have the clean checkmend report for it. The iphone recognizes the network when i put sim card because the network name appears on the "about" section. I put an orange Simcard and i see Orange in network name. But not gives any signal.

m11c3 · 12-23-2014, 08:55

i have same problem about no service. but my problem after change flex connector charging. i try compare with original flex charging from other phone the signal normal

i think the problem is the antena.
i try resolder and still no service

*click the photos for big size

sandy2626 · 12-24-2014, 01:17

Quote:

Originally Posted by m11c3

i have same problem about no service. but my problem after change flex connector charging. i try compare with original flex charging from other phone the signal normal

i think the problem is the antena.
i try resolder and still no service

*click the photos for big size

I don't think that the problem comes from the antena. Try with a flex connector from a good iphone 5 or place your motherboard in a good case and you'll see.
It seems that your problem is like mine, something in the MB (damage or screws problem) don't know.

12-11-2014, 00:37	#46 (permalink)
haseebrehman Insane Poster Join Date: Jul 2014 Location: atlantic ocean Posts: 64 Member: 2225865 Status: Offline Thanks Meter: 38	hi Sandy i had same problem and fixed , i remembered that i changed top dual screw antenna flex also changed the antenna cable near the vibrator and left phone with WiFi connected (a 100% working sim card was inside) also 6 pins of sim reader lift slightly upwards and cleaned them with alcohol pads. Try all These steps hope you will get good results. Thanks,.

12-17-2014, 08:21	#49 (permalink)
sandy2626 Insane Poster Join Date: Jan 2006 Posts: 83 Member: 226788 Status: Offline Thanks Meter: 3	Hi all What is the c1712rf ?vit is missing also in my pcb ! Please who knows that ? Laptopmd ?

12-17-2014, 10:50	#50 (permalink)
sandy2626 Insane Poster Join Date: Jan 2006 Posts: 83 Member: 226788 Status: Offline Thanks Meter: 3	Sorry but it is the C366 that is missing and not the C367. As please C366 and C1712rf what are they doing ! Are they working for the GSM signal ? What i must do for replace those parts? Thanks

12-17-2014, 22:22	#52 (permalink)
sandy2626 Insane Poster Join Date: Jan 2006 Posts: 83 Member: 226788 Status: Offline Thanks Meter: 3	Here some photos. Thank you for time you give. https://www.dropbox.com/sc/9lsqujj6r...Mi6ZgBXVeBFC2a

12-18-2014, 23:18	#53 (permalink)
sandy2626 Insane Poster Join Date: Jan 2006 Posts: 83 Member: 226788 Status: Offline Thanks Meter: 3	Hi Did you see the pictures ?what do you think?

12-18-2014, 23:48	#55 (permalink)
sandy2626 Insane Poster Join Date: Jan 2006 Posts: 83 Member: 226788 Status: Offline Thanks Meter: 3	Also i have eared thet the place of screws is very important. I think that it is important to very this. How can i know if all screws are in their good emplacement ?

12-20-2014, 22:34	#57 (permalink)
qwertybasse Freak Poster Join Date: Mar 2014 Posts: 195 Member: 2142442 Status: Offline Thanks Meter: 53	Do you have imei? can you check if your imei is stolen/lost/blocked ? If you dont have imei (N/A) then you have problem in baseband unit

12-21-2014, 00:56	#58 (permalink)
sandy2626 Insane Poster Join Date: Jan 2006 Posts: 83 Member: 226788 Status: Offline Thanks Meter: 3	Hi Yes the iphone has a clean IMEI no lost no stolen i have the clean checkmend report for it. The iphone recognizes the network when i put sim card because the network name appears on the "about" section. I put an orange Simcard and i see Orange in network name. But not gives any signal.

12-23-2014, 08:55	#59 (permalink)
m11c3 Junior Member Join Date: Jun 2010 Location: bandung, indonesia Posts: 18 Member: 1334490 Status: Offline Sonork: 124.81.xx Thanks Meter: 3	i have same problem about no service. but my problem after change flex connector charging. i try compare with original flex charging from other phone the signal normal i think the problem is the antena. i try resolder and still no service *click the photos for big size