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Fido_Castro wrote:
Hi Moderator,
I think you are the right person to answer this question, but I need you to clarify a bit of the term 'SIM format'. My understanding of the term is its form factor (physical measurements). The SIM card in question is a mini-SIM, the most commonly used format so far (2FF), of course issued by Fido. I have been using it with my LG Xenon phone with no problem at all, voice call, SMS, 3G data... But as I put it in a 2-year-old factory unlocked, unbranded LG E720 (Optimus Chic) phone, the SIM card does not work and keep crashing the Android OS (error messages popping up every 10 seconds). Other SIM cards do not do that, and as I popped my Fido card back in my usual phone, it works as normal. I was told by some phone salesperson that my Fido SIM is of an outdated 2FF format that physically is different from newer 2FF cards by the total surface area of the metal contacts and the way the contact areas are partitioned. The plastic part of my card is certainly of the same size as other cards, but the golden metal contact part are significantly bigger than other cards. Do I have to pay for replacing an obsolete SIM card for a newer one of the same 2FF format? If you say they are of the same physical dimensions but of different formats, I am really curious of their respective format names as Google cannot give me an answer. Thanks.
Hi Fido_Castro,
I can confirm that Judhy was referring to the actual physical size of the SIM card (Mini SIM | Micro SIM | Nano SIM). There would be no difference in the metal contacts between a 2G Mini SIM and a 3G Mini SIM. I am sorry if you were told otherwise.
This is the first time that I've heard of a phone losing it's mind when a SIM card is inserted.
@ Community - any ideas?
Click on the thumbs up image 
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Cliquez sur l'image du pouce en l'air pour signifier votre appréciation d'un message ou d'un autre membre de la communauté.
Et n'oubliez pas de cliquer Accepté comme une solution dans les options du menu déroulant, lorsque vous aurez obtenu la réponse que vous recherchiez ; cela renforcera notre communauté.
to like a post or a fellow member of the community.And don't forget to click Accept as Solution in the options drop-down menu once you've received the answer you were looking for; it'll help our community grow stronger.
Cliquez sur l'image du pouce en l'air
pour signifier votre appréciation d'un message ou d'un autre membre de la communauté.Et n'oubliez pas de cliquer Accepté comme une solution dans les options du menu déroulant, lorsque vous aurez obtenu la réponse que vous recherchiez ; cela renforcera notre communauté.
Re: Old format SIM card
Hey Fido_Castro,
Sorry if I gave the impression that it was 2G / 3G giving the issue.
Please click on my name and then send me a private message (you'll see the option on the right side of the screen) including your phone number.
Click on the thumbs up image to like a post or a fellow member of the community.
And don't forget to click Accept as Solution in the options drop-down menu once you've received the answer you were looking for; it'll help our community grow stronger.
Cliquez sur l'image du pouce en l'air pour signifier votre appréciation d'un message ou d'un autre membre de la communauté.
Et n'oubliez pas de cliquer Accepté comme une solution dans les options du menu déroulant, lorsque vous aurez obtenu la réponse que vous recherchiez ; cela renforcera notre communauté.
to like a post or a fellow member of the community.And don't forget to click Accept as Solution in the options drop-down menu once you've received the answer you were looking for; it'll help our community grow stronger.
Cliquez sur l'image du pouce en l'air
pour signifier votre appréciation d'un message ou d'un autre membre de la communauté.Et n'oubliez pas de cliquer Accepté comme une solution dans les options du menu déroulant, lorsque vous aurez obtenu la réponse que vous recherchiez ; cela renforcera notre communauté.
