The first model of iPhone, Model A1203 with 4, 8, or 16 GB capacity and an aluminum back. Repair requires a significant amount of prying, and may require some soldering.

285 Questions View all

Shuts down, no signal and battery problems only with sim card inserted

I have 3 iPhones with the same symptom. Battery goes down quickly, shuts down or no signal ONLY when you insert de SIM card. I've tested all these 3 iPhones with no SIM card, and they don't shut down, no baterry drain. I've tested with several SIMs cards that work perfectly in other devices (I mean other iPhones)

Answered! View the answer I have this problem too

Is this a good question?

Score 1
Add a comment

Free shipping on all orders over $100 or containing a Pro Tech Toolkit!

Browse Our Store

2 Answers

Chosen Solution

in my opinion - there are 2 possible problems (if fluid damages are ruled out in the first place)

1, the batteries are extremely weak - as soon as the phone uses the mobile phone part - the battery crashes

2, the Skyworks GSM/Edge Power amplifier (SKY77340) is faulty

Block Image

(top right on the picture)

i use an infra red thermometer to find those faulty parts

but as i said, those two things are pretty common failures on other phones

Was this answer helpful?

Score 3


+ good answer. I couldn't find anything for those bizarre symptoms.


really good answer. I don know about this infra red thermometer, and it seems to be a useful tool. Where I can found it, and how do I use it?


²majesty - i worked as technician in a nokia store and was self employed for years in that business. ²macpatagon - search ebay for infrared thermometer - but you can use the cheapest one for 2 or 3$ - it's not important to have the exact temperature - important is the difference. using it is simple, press a button and hold it directly over the parts - if you hold it over every area of the board - you can find faulty ic's extremely fast


@ Markus: I can see that. You have to have hands on experience to troubleshoot bizarre cases like this one.


Add a comment

I am having the same problem with all the nokia phones I have, with one particular sim. Even with those phones that work fine with other sims. - Help!

Was this answer helpful?

Score 0


the sim most likely is faulty or simply incompatible with your phones


Add a comment

Add your answer

Flavio will be eternally grateful.
View Statistics:

Past 24 Hours: 0

Past 7 Days: 4

Past 30 Days: 8

All Time: 5,068