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Cellular Phones/How do I remove SIM card (Samsung A640)


Trying to put my mom's card into this phone so that she may use it. I've found page after page of articles saying "remove the SIM card and..." but they don't tell you how to do this. Where is the SIM card located in the phone, and how do you get it out of the phone? It's a Samsung A640.(Yes, I'm new to cell phones lol)

Hi Kryz -

The Samsung A640 is a CDMA device that was sold by Sprint and Qwest. CDMA phones in the United States do not use SIM cards. The ESN number of the device is coded to your wireless number by the wireless provider in order to make your phone work. Only the GSM providers (i.e., T-Mobile and AT&T) use SIM cards. In order for your mother to use this phone, she would need to have Sprint service and then she should give Sprint a call and let her know that she is going to be using a new phone. She would then give them the ESN number of this phone (located under the battery on a white sticker) and her current mobile number and they would then make her mobile number work with this phone. As long as the bill is paid up to date on the phone and it is no longer associated with any other Sprint number, Sprint will be happy to do this for her.

Where did you get this phone? Does your mother have Sprint service today? Thanks so much. DebiN

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I can answer questions on cellular phones, the physical device, the network, contracts, billing, ordering, porting and what to look for when purchasing cell phones. I am located in the United States. I am an expert on BlackBerrys, Treos, HTC devices and iPhones as well as cellphones and aircards. I have over 15 years of experience in both the wireless and wireline world with the carriers. I have a lot of knowledge regarding the wireless providers - their services, prices and policies, both GSM AT&T and T-Mobile) and CDMA (Verizon, Sprint/Nextel). I am very familiar with the individual devices and their specifications. I can also answer questions regarding BlackBerrys, iPhones and other PDAs, both Palm-based and Windows-based. I can troubleshoot most any problem someone is having with their cellular device or with the provider.


Over 20 years in the Telecom industry working for the carriers with individuals, small business, medium business and large corporations(Fortune 500). Also worked as a professor in Maryland for 10 years teaching telecommunications.

I belong to several organizations

Master's in Telecommunications

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Received several awards for papers that I have published over the years

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