iPhone 4 No Sim card after water - GSM-Forum

Jack_OH · 09-14-2013, 14:35

iPhone 4 No Sim card after water.

i set date and time, imie wifi bt ok!
others is working fine, but no sim
i cleaned the sim tray:

and the ic

i will just remove this ic?

Jack_OH · 09-15-2013, 05:59

have anybody any idea?

kostelectronics · 09-15-2013, 07:53

Check if you have 1.6V at the Switch on the SIM-Holder when you open it. then check the VCC-SIM voltage in the Moment when you open the Switch. it must Pop up for a very short time. Also check for any low resistance on all 6 SIM-Contacts (except the GND)

they must be in MOhm-range.

dazki|_17 · 09-15-2013, 08:18

did you try another sim in the unit???

Jack_OH · 09-15-2013, 09:44

Quote:

Originally Posted by dazki|_17

did you try another sim in the unit???

of course, and i set date and time...

The 1.6V is missing. (I tired an another board, on the second board is come 1.6V when i disconnect the golden connector.)

Jack_OH · 09-15-2013, 14:56

Maybe i found the problem:
R9_RF

kostelectronics · 09-15-2013, 15:58

Of course! That's your Problem 100%

(It's a 1MOhm 01005 SMD)

Good Luck!

Jack_OH · 09-15-2013, 16:39

i can't jump it because it's 1megaohm, right?

the 2 pads are missing, how do you do it?

i think scratch the lines and solder with thin wire and the resistance...

thanks a lot!!!

kostelectronics · 09-15-2013, 22:33

omg, that's bad! no Chance to grab the broken pad? maybe you can just solder a resistor to the Switch and connect it to the 1.8V line with a very small wire. ....better than a dead phone

i hate works like that, but if you have no other choice....

BR Matthias

Jack_OH · 01-12-2014, 16:36

I have another i4, with sim problem. When i put a sim card, it's say no sim. i reboot the phone, and it's Locked SIM, but when i try to unlock, enter the pin, the phone freeze, i can't unlock the sim, i'm waiting....

09-14-2013, 14:35	#1 (permalink)
Jack_OH No Life Poster Join Date: Mar 2007 Age: 39 Posts: 681 Member: 475448 Status: Offline Thanks Meter: 60	iPhone 4 No Sim card after water iPhone 4 No Sim card after water. i set date and time, imie wifi bt ok! others is working fine, but no sim i cleaned the sim tray: and the ic i will just remove this ic?

09-15-2013, 05:59	#2 (permalink)
Jack_OH No Life Poster Join Date: Mar 2007 Age: 39 Posts: 681 Member: 475448 Status: Offline Thanks Meter: 60	have anybody any idea?

09-15-2013, 07:53	#3 (permalink)
kostelectronics No Life Poster Join Date: Apr 2009 Location: Wikon, Switzerland Posts: 941 Member: 1012778 Status: Offline Thanks Meter: 245	Check if you have 1.6V at the Switch on the SIM-Holder when you open it. then check the VCC-SIM voltage in the Moment when you open the Switch. it must Pop up for a very short time. Also check for any low resistance on all 6 SIM-Contacts (except the GND) they must be in MOhm-range.

09-15-2013, 08:18	#4 (permalink)
dazki\|_17 Insane Poster Join Date: Jun 2013 Location: manila Posts: 98 Member: 1958157 Status: Offline Sonork: kidaz_17 Thanks Meter: 4	did you try another sim in the unit???

09-15-2013, 14:56	#6 (permalink)
Jack_OH No Life Poster Join Date: Mar 2007 Age: 39 Posts: 681 Member: 475448 Status: Offline Thanks Meter: 60	Maybe i found the problem: R9_RF

09-15-2013, 15:58	#7 (permalink)
kostelectronics No Life Poster Join Date: Apr 2009 Location: Wikon, Switzerland Posts: 941 Member: 1012778 Status: Offline Thanks Meter: 245	Of course! That's your Problem 100% (It's a 1MOhm 01005 SMD) Good Luck!

09-15-2013, 16:39	#8 (permalink)
Jack_OH No Life Poster Join Date: Mar 2007 Age: 39 Posts: 681 Member: 475448 Status: Offline Thanks Meter: 60	i can't jump it because it's 1megaohm, right? the 2 pads are missing, how do you do it? i think scratch the lines and solder with thin wire and the resistance... thanks a lot!!!

09-15-2013, 22:33	#9 (permalink)
kostelectronics No Life Poster Join Date: Apr 2009 Location: Wikon, Switzerland Posts: 941 Member: 1012778 Status: Offline Thanks Meter: 245	omg, that's bad! no Chance to grab the broken pad? maybe you can just solder a resistor to the Switch and connect it to the 1.8V line with a very small wire. ....better than a dead phone i hate works like that, but if you have no other choice.... BR Matthias

01-12-2014, 16:36	#10 (permalink)
Jack_OH No Life Poster Join Date: Mar 2007 Age: 39 Posts: 681 Member: 475448 Status: Offline Thanks Meter: 60	I have another i4, with sim problem. When i put a sim card, it's say no sim. i reboot the phone, and it's Locked SIM, but when i try to unlock, enter the pin, the phone freeze, i can't unlock the sim, i'm waiting....