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Revamped version of the iPhone 3G with faster processing speeds. Repair of this device is similar to the 3G, and requires simple screwdrivers and prying tools. Model A1303 / 8, 16 or 32 GB capacity / black or white plastic back.

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Can a bad SIM drain battery in 90 minutes?

So I replaced my battery because bu 3GS was going dead from a full charge in about 90 minutes with an always warm case. The new battery didn't help... But since I need a phone I bit the bullet and got a new phone.

I wiped the old phone, and put in a Hong Kong sim card (my normal one is from Macau), placed all my apps back on it, and charged it up.

I have left it unplugged for 30 hours and the battery is sitting at 91%. The new phone (with the old Macau SIM card) is a iPhone 4, and it's going through batteries quickly (about 6 hours - 8 hours, including juice pack)

Is it possible for a SIM card with wear and tear to somehow drain a battery stupid quickly? OR is it possible that there is some strange carrier setting that changed with a new carrier profile that is killing my battery? Any thoughts on how to diagnose?

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5 Answers

I found that using a sim that does not get service (overseas carrier, no roaming agreements..) caused my phone to keep searching for a usable carrier, and drained my mobile quite quickly.

This was before iPhone, but still an observation - that maybe still holds true

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First thing would be to try swapping the sim. It does seem that some SIM cards on some networks drive iPhone crazy (for unknown reasons). So swapping the SIM could troubleshoot that. There may be some setting you need to look into as well since there are many things that effect battery life. You could also have a drain if your phone is connected to WiFi or the push/fetch settings on your phone are activated.Also turn off push for all mail accounts. Take a look at those settings on your phone . Please do not forget about blue tooth devices as well as those connections will drain battery life as well. Also , watch for any apps that are using fetch etc. since they can drain your battery in a hurry. So the way I'd proceed is to

1.Shut down the phone, left it off for about 2 mins, and then restarted (idea is to close down any app that might have crashed and is draining power)

2. Charge the phone to 100%

3. Set location services to off, Wireless on, 3G on, push off, Fetch Manually

and see what happens. Good luck and let us know....

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Its because of GSM/ CDMA auto mode , change it to GSM only ->http://www.techturnedon.com/2013/06/sim-...

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I changed my SIM card in my 6s plus and went from two days battery to 1/2 day. After trying everything to no avail I switched back to the old card and immediately went back to two says

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I downgraded my tarrif in January and have been having battery issues ever since. I recently upgraded because the battery situation got from bad to worse. I had a problem with my new phone so I took it back in-store to cancel my contract. Being without a phone isn't an option as we all know so I put my new SIM in my old phone and I'm wonderstruck because my battery is holding longer... It's actually taking time to charge too which is normal for a HTC m7 one. I don't know why but it seems the SIM was the issue. Network operators send signals to the SIM so I'm sure it affected the battery life especially when service providers want to tie you into a new contract. My contract hasn't been cancelled yet so I'm still on my new tariff in my old phone. Would be interesting to know what will happen when my tariff is reversed... So far I firmly believe it was an issue with the SIM and the network controllers have something to do with it. It's all about business and that's why they're bringing out new phones all the time. Me using my old phone on a cheaper tariff isn't profiting them if you really think of it.

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Neil Dreher will be eternally grateful.
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