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==Introduction==
<p>An embedded-SIM (eSIM) or embedded universal integrated circuit card (eUICC) is a form of programmable SIM card that is embedded directly into a device. The surface mount format provides the same electrical interface as the full size, 2FF, and 3FF SIM cards, but is soldered to a circuit board as part of the manufacturing process. In machine to machine (M2M) applications where there is no requirement to change the SIM card, this avoids the requirement for a connector, improving reliability and security. An eSIM can be provisioned remotely; end-users can add or remove operators without the need to physically swap a SIM from the device.
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<p>In order to use eSIM with Teltonika Networks devices, some basic requirements must be met.</p>
==eSIM Dimensions==
<p>Must match standard MFF2 eSIM size:</p>
[[File:ESIMreq.jpg|border|class=tlt-border|800px]]
==eSIM Pin-Out==
<p>There are two default eSIM pin-outs:</p>
[[File:Pin-outs.jpg|border|class=tlt-border|300px]]
<p>The only difference in pin-outs is the IO pin – 2 or 3. Both versions of pin-outs are suitable for devices with eSIM.</p>
==Requirements for eSIM packing reel: ==
<p>13“ in diameter.</p>