HTC One dual sim

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micro UIM and micro SIM cards

HTC One has two card slots that allow you to insert a micro UIM card and GSM micro SIM card. Both CDMA and GSM connections can be active at the same time, and you can choose which one to use when placing your call.

Inserting the micro UIM and micro SIM cards

Important: Use standard micro UIM and micro SIM cards only. Inserting a smaller size card (such as a nano UIM/SIM with an adapter or a modified UIM/SIM) may cause the card to not fit properly or damage the card slot.
  1. Take the back cover off.
  2. In the slot 1, insert a CDMA micro UIM or 3G/GSM micro SIM card. In the slot 2, insert a GSM micro SIM card.

    When inserting, make sure the card’s gold contacts are facing down and its cut-off corner facing in.

Removing the micro UIM and micro SIM cards

Important: Make sure to switch off HTC One before removing your micro UIM and micro SIM cards.
  1. Take the back cover off.
  2. Press the micro UIM or micro SIM card to eject it from its slot.
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