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What is an ESN number?

An ESN (Electronic Serial Number) is a unique identifier tied to all cellular devices. ESNs can be found in a few different formats. The most common is the IMEI (International Mobile Equipment Identity). However, some older mobile devices have a MEID (Mobile Equipment Identifier).

No two devices should ever have the same ESN / IMEI, and reviewing this number is one of the most important steps in Swappa's listing review process. Thus, it's crucial to ensure that you provide the proper ESN when creating a listing on Swappa.

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