Old Postpaid SIM to be used as Prepaid?

[UsedSIM]

Hello,

I have an old postpaid SIM from iphone (ATT).  I have since upgrade to a Galaxy and received a new SIM (same phone #).

Can I use/activate the old SIM with a prepaid service?

I know I shouldn't use prepaid with iPhone, so I also have an old Cingular Razor (unlocked b/c off contract) that I intend to use with the old iphone SIM as prepaid for family member.

Can this be done?

Can it be done online (activation site) or must I go to a store?

Thanks.

[hme83 ACE - Professor · Accepted solution]

No - once you activated the new SIM with your Galaxy the old SIM associated with your phone number was deactivated by at&t.  Deactivated SIMs cannot be reactivated and used with a different phone number. 

If you want an additional prepaid account/phone number, you'll need to obtain a new SIM and set up a prepaid line of service.

[UsedSIM]

Thanks for the response hme.

Next question..

ATT prepaid plan (on website) appears to require a purchase of a GoPhone device.  There isn't an option to purchase just the SIM.  I know you can buy the unactivated prepaid SIM from Amazon and Ebay, so does that mean ATT store will sell just the SIM and plan without the device?

[robertmiller]

I guess so.

[youngjm ACE - Professor]

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UsedSIM wrote:

Thanks for the response hme.

Next question..

ATT prepaid plan (on website) appears to require a purchase of a GoPhone device.  There isn't an option to purchase just the SIM.  I know you can buy the unactivated prepaid SIM from Amazon and Ebay, so does that mean ATT store will sell just the SIM and plan without the device?

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It has been a while but I did buy just the SIM with some starup airtime right from a store.

[hme83 ACE - Professor · Accepted solution]

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UsedSIM wrote:

Thanks for the response hme.

Next question..

ATT prepaid plan (on website) appears to require a purchase of a GoPhone device.  There isn't an option to purchase just the SIM.  I know you can buy the unactivated prepaid SIM from Amazon and Ebay, so does that mean ATT store will sell just the SIM and plan without the device?

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You're welcome.

You shouldn't have any trouble obtaining a SIM at your local at&t corporate store, and AFAIK there won't be a charge for the SIM if you'll add airtime to the account while you are in the store.  Just let the store personnel know that you have an old Cingular/at&t phone that you intend to use for the prepaid account; and in fact I'd take the old Razr with you so that you can be certain the account is set up and working correctly before you leave the store.