• Q) Can I sign up as a foreigner?

    Yes. Once you complete the identity verification & authentication procedure you can sign up for a  USIM. You can choose "Any One" among the following methods for verification:

    + Bank A/c verification: 1 won will be deposited to the provided bank account.
    + Joint Certificate: Naver/PASS/Toss/Payco
    + Credit card (no debit cards)


  • Q) Can I still proceed with changing my telecom/plan if the number authentication process fails?

    You can request for authentication only five times a day.

    You will not be able to proceed with switching your  telecom/carrier/plan if the error in the authentication process exceeds 5 times on a particular day.

    At such, you have to wait until the following day to request authentication and then proceed with the transfer process.

  • Q) How do I apply and register for a USIM ?

    1. Go to  QQ010 homepage.

    2. Choose a plan.

    3. Sign up and Log in .

    4. Fill out the application form.

    5. Receive Verification Call from our Customer service.

    6. USIM is shipped to user.

    - Koreans. ( Transferring numbers only) -  USIM are shipped without activation.

    - Foreigner: (Prepaid/postpaid. - New number/Number Transfer) -  USIM is shipped after registration & activation.

    7. Receive USIM & use.

    - Koreans. - Contact customer center to request registration & activation of number after receiving USIM.

    - Foreigner: You can use the USIM straight away by inserting it into device.

  • Q) Can someone else use the USIM that I have registered to?

    A USIM that has been registered under your name cannot be assigned to someone else. It is a medium of personal identification and verification. We suggest you refrain from sharing it with someone else.

  • Q) Can I keep using my existing USIM when I change my number to a different telecom/carrier/plan ?

    A USIM registered under a specific Telecom/Carrier/Plan can only be used for that particular Telecom/Carrier and in most cases that specific plan. You cannot use that same USIM when you are switching  the plan value/ telecom or carrier of your number. When doing so you will get a new USIM from that particular plan issued by the given Carrier/Telecom company.

  • Q) Will I still be able to use discounts, mileages or point services offered by my existing company even after I change the telecom?

    When the number is transferred to a new network, all the applied benefits received from the previous carrier will be dissolved. You will only be eligible for benefits and services offered by the new company.

  • Q) Do I need to terminate the services from my existing telecom first if I want to change the telecom/plan?

    When you apply for a transfer, the services associated with your number in the existing telecom will be automatically terminated and shifted to the new company (Telecom/Carrier).

    Please "DO NOT " apply for termination of number with your existing telecom.

    If you apply for termination, this will delete your number and you will not be able to use it later on. 

  • Q) Can I keep my number and only change the Telecom/Carrier company or plan amount?

    Yes. You can use the number as you have with your existing carrier -both prepaid & postpaid and only change the Plan amount/ Telecom/Carrier company  (excluding number starting with 011, 016, 017, 018, 019 ). However, there are conditions that apply for transfers. You must contact the customer service and confirm this before proceeding. 

  • Q) How will I be charged if I sign up at the end of the month?

    If you sign up for a Postpaid number. the charges are calculated on a daily rate basis from the date of registration. (Additional services are also charged on a daily basis.) You will receive bill accordingly.

    In case of Prepaid Sims, depending on the type and plan amount, you need to top-up  every 30 days. 

  • Q) How is the call quality like with MVNOs (알뜰폰)?

    MVNO (알뜰폰) companies operate by renting out communication networks,and services  from MNO companies (SK/KT/LGU+). There is no difference in quality between MNO and MVNO ( 알뜰폰) company products.

  • Q) Checking the status of shipping

    1. Visit our Web site QQ010 .

    2. Select MyPage option on the right.

    3. You will be able to check your delivery status .

  • Q) In case of a defective USIM

    Incase  the USIM recived  is not working or recognized by your device, please contact the customer center.

    - Customer center number: 1666-2842

    - 10am - 6pm  on weekdays (excluding weekends and holidays)

    - Lunch time: 12pm - 1pm.

  • Q) USIM delivery

    After completing the online application, you will receive a verification call from the customer support.

    Once the verification call is complete,and all the details are confirmed,the USIM will be registered and sent out for delivery.

    Verification Call (Registration) Time: Mon- Fridays: 10 am to 6pm  (Off on weekends and holidays)

    Lunch time: 1pm-2pm .  Applications received after 6pm, will be processed the next day.

    If the applicant does not receive the Verification Call, USIM registration process will not be considered complete and will be on hold. 

  • Q) What is eSIM service?

    It is a next-generation digital SIM card developed to play the role of an existing physical USIM card generally used for mobile phones. eSIM is installed as a digital chipset on the device. You may download/activate the SIM profile of the carrier from the server of the eSIM provider via the Internet. eSIM is also called the Embedded Universal Circuit Card (eUICC).
    As its name the "embedded subscriber identification module (eSIM)" indicates, you do not need to buy an extra physical SIM chip; you can simply download the subscriber's information of the carrier and activate your mobile phone. An easier and quicker method to achieve service activation

  • Q) How to scan the code?

    To scan a QR code from your iPhone, you can set the focus on the QR code using the default camera app, or go to Settings > Cellular and click Add Cellular Plan at the bottom; a QR code scanner will pop up. At this time, the iPhone must be connected to the Internet to scan/activate the eSIM.

  • Q) What are the advantages of an eSIM?

    It’s easier to switch networks. An eSIM makes it much easier to switch mobile networks.
    You can temporary change to another network. Up to five virtual SIM cards can be stored on one eSIM at a time.
    Allows you to have more than one SIM. eSIMs also offer the same advantages as dual-SIM phones with two slots for traditional plastic SIMs, the most obvious being that you can have two phone numbers on one device.
    Uses less physical phone space. Another advantage of eSIMs is that they will eventually negate the need for a physical SIM card and its tray.

  • Q) Can I use the Tplus eSIM plan abroad?

    As the Tplus eSIM service is a service provided by a domestic MVNO operator, you are unable to use it abroad.

  • Q) On which devices is the eSIM service available?

    Apple iPhone XR and later versions. It can be used on the devices with iOS 12.1.1 or higher.
    Go to your iPhone's Settings >General >Info ; if you can see "Digital SIM Info" there, you may use our eSIM service on your device.

  • Q) Can I use the same QR code on another phone?

    eSIMs can be installed on only one device, and most eSIMs can be installed only once, which means that if you remove the eSIM from your device it will not be possible to install it again.

  • Q) How many eSIMs can be stored on my phone?

    There are two lines (main and secondary) that can be used simultaneously on your iPhone; one is used for a physical USIM card and the other is used for eSIM. Up to 10 eSIMs can be stored and used on either the main line or secondary line.

  • Q) How do I change the device to a new iPhone?

    1. Get a new eSIM QR code on our website
    2. Check your registered email, Scan the QR code into your new phone. 

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