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Old Nov 27, 2011, 04:44 PM   #1
sunsnewmac
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About to cut another SIM card...

I've successfully cut 2 miniSIMs down to microSIMs that work fine in my iPhone 4s. Now I have another miniSIM (the one that has all my prepaid $$ on it!) that I want to cut down. Problem is, this SIM has a large-size chip. The chip is much larger than it is on either of the other two mini-SIMs--on which I only had to cut away plastic. Here, it is inevitable to cut part of the chip (albeit a part that doesn't make contact). So I'm pretty scared because one wrong snip and I lose nearly $100 in credit. I found a tutorial online that shows how to trim these types: http://www.solutios.com/simcutting/

Problem is, I can align the circuit lines two different ways as follows:



and:


So which is it, align top or align bottom? Thank you!!!
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Old Nov 27, 2011, 08:00 PM   #2
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Looks like AT$T, is it?

Make a guess, if it doesn't work out pay them the $15 for a micro sim.

I have a sim cutter from cutyoursim.com and this is what it did to my sim. Looks to me like it took the middle right out.



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Old Nov 27, 2011, 11:14 PM   #3
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I dont mind getting a new microSIM, it's just that I have a $100 credit on a gophone SIM (you guessed it, ATT) that expires in Feb and if I cut this properly can access those funds...which are not transferable unfortunately.
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Old Nov 27, 2011, 11:25 PM   #4
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Quote:
Originally Posted by sunsnewmac View Post
I dont mind getting a new microSIM, it's just that I have a $100 credit on a gophone SIM (you guessed it, ATT) that expires in Feb and if I cut this properly can access those funds...which are not transferable unfortunately.
Would AT&T transfer/copy that sim to a microsim for you?
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Old Nov 28, 2011, 12:19 AM   #5
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It can be done. I just did the same for a German sim

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Old Nov 28, 2011, 01:24 AM   #6
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Quote:
Originally Posted by SporkLover View Post
It can be done. I just did the same for a German sim

Image
Based on your picture, it would seem that the top picture I posted above is the way to align the circuit before cutting?
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Old Nov 28, 2011, 03:36 AM   #7
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When I First Got My

Iphone 4, I ordered a microsim from my carrier (O2) Impatient to try my newbie, I attempted to cut the large sim I had (I'm on contract anyway so credit wasn't an issue)

I was really careful, but....I trashed it! Luckily, my microsim arrived the next day. Rather you guy's than me!

Fortunately it's not a problem anymore. When I got my new 4S the sim just slotted in as it should. Does trying this type of thing invalidate your phones warranty? Say if you got it wrong and it jammed in?
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Old Nov 28, 2011, 06:48 AM   #8
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Att will move your account money to a new sim but what they might not do is give you a MicroSIM on a go phone plan.

My vote is to do it right any get a sim cutter like I did.
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Old Nov 28, 2011, 01:11 PM   #9
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Quote:
Originally Posted by MaxBurn View Post
Att will move your account money to a new sim but what they might not do is give you a MicroSIM on a go phone plan.

My vote is to do it right any get a sim cutter like I did.
ATT told me they can transfer me to a microSIM, only if I am an authorized user on the account. Trouble is, the SIM belonged to a relative who is now dead. that is actually why I have the SIM. So I don't know how they expect me to be added as an authorized user. I'm going to visit my nearest ATT store in person and hope that they are kind enough to help given the circumstances.

If that fails, then I am pretty much forced to cut the card. But using a card cutter is not ideal--the reviews for this cutter, for example show that people with the large-format chip (like German SIMs have apparently) messed up their SIM using a cutter. If done by hand, it can be done properly. This is why I posted my original two photos to ask which way to align the chip. (http://www.amazon.com/Cutter-Micro-Adapters-Apple-iPhone/product-reviews/B0045XR5IS/ref=cm_cr_dp_synop?ie=UTF8&showViewpoints=0&sortBy=bySubmissionDateDescending#R19A2WMPZGSD23
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Old Nov 28, 2011, 01:24 PM   #10
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Whether you use the cutter or not where you cut does not change. Actually there are templates that you can find online for where to cut. You could even use my second picture as an example.
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Old Nov 28, 2011, 02:28 PM   #11
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A SIM cutter should do the trick fine.
I used them plenty of times and each time it gives a perfect microsim.
Maybe they have them at the AT&T store.
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Old Nov 28, 2011, 02:50 PM   #12
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Quote:
Originally Posted by MaxBurn View Post
Whether you use the cutter or not where you cut does not change. Actually there are templates that you can find online for where to cut. You could even use my second picture as an example.
It's not the SHAPE of the cut that is the concern. I already cut down two SIMs successfully--but they are the ones with the small chip and therefore easy to cut. The SIM with the big chip is my concern. One has to pay close attention to the circuit and where the lines are. That's why I posted those pictures!

There are two ways to align the card to achieve the same exact size microSIM. I found a link to a Website (which i also posted in the original post) that shows how to cut the SIM with large chip, but the site is not clear on where to align the circuit.

SporkLover's comment is the most valuable, and shows that the alignment is with the top, non-beveled side of the SIM card. But I just want to be absolutely sure.
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Old Nov 28, 2011, 03:02 PM   #13
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Quote:
Originally Posted by sunsnewmac View Post
It's not the SHAPE of the cut that is the concern. I already cut down two SIMs successfully--but they are the ones with the small chip and therefore easy to cut. The SIM with the big chip is my concern. One has to pay close attention to the circuit and where the lines are. That's why I posted those pictures!

There are two ways to align the card to achieve the same exact size microSIM. I found a link to a Website (which i also posted in the original post) that shows how to cut the SIM with large chip, but the site is not clear on where to align the circuit.

SporkLover's comment is the most valuable, and shows that the alignment is with the top, non-beveled side of the SIM card. But I just want to be absolutely sure.
I cut a few sims with the old style big round chip.
The sim cutter took some of the metal sim part off the circuit too but it still worked fine.
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Old Nov 28, 2011, 03:42 PM   #14
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Definitely the top is what you are gonna cut after. Use a sharp razor blade and cut it along the side of the chip until you go through the card. This is what i have done, just take your time and you'll be fine!
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Old Nov 28, 2011, 03:56 PM   #15
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Quote:
Originally Posted by sunsnewmac View Post
There are two ways to align the card to achieve the same exact size microSIM.
Do not align anything, cut in the same place as shown that the cutter does. If you align it I am afraid you will end up with the contacts shifted off to one side. This might help, this is a real microSIM from ATT for my ipad. Note how the contacts are off to one side, this is the way it should be so they can line up with the metal fingers in the sim slot.



The only thing that concerns me is that you may end up with the metal contacts in contact with the metal sim tray. You want to insulate them somehow, maybe with paint?
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Old Nov 28, 2011, 04:07 PM   #16
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Or in other words neither of the pictures you posted in the first post look correct to me, that cut sim looks like it is slightly off to one side. It likely works because the amount it is off is less than the width of the contact.

As I have shown the amount of material you remove should be about the same on each side, as you can see with the leftovers I pictured.
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Old Nov 28, 2011, 05:13 PM   #17
sunsnewmac
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success! I found another old SIM that has the large size chip. I cut it according to the top picture, aligning on the non-beveled side. Had to slice a little bit into the chip but ultimately it worked! So now, I just have to replicate the success with my ATT card
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Old Nov 28, 2011, 09:03 PM   #18
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@sun

I paid close attention to where the sim appeared to be making contact (wear marks).

I made my template by lining those up and then trimming it down. Slowly slicing off the non metallic material until it fit in the sim holder.

Good luck!
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