Frequently Asked Questions (FAQ)

koro is an MVNO service that makes using mobile services in Korea easier and faster. - Registration may be restricted for foreigners staying less than 30 days or without an Alien Registration Card (ARC). - Registration is restricted if you have unpaid or overdue bills with another carrier. - Number transfer is restricted if you have used your current carrier for less than 3 months.

Activation usually follows these steps. 1. Select a plan on the koro website 2. Select a language (한국어 / English / 简体中文 / ไทย / Tiếng Việt / Oʻzbekcha / Bahasa Indonesia) 3. Select a registration method 4. Fill out the application form 5. Submit the final activation request (self-activation activates your line immediately.) 💡 Your USIM will be delivered to a Korean address after you apply. (1–3 business days) ⚠️ [Self-activation hours] 1. Number Transfer - 10:00–20:30 (Excludes Sundays and Korean traditional holidays) 2. New Signup - 09:00–22:00 (Excludes Sundays) ※ Activation cannot proceed outside these hours. Please complete the process during the hours above.

[Korean nationals] You can verify your identity with a resident registration card or driver's license. [Foreign nationals] Only government-issued photo ID is accepted. Accepted ID: - Alien Registration Card (ARC) - Resident Registration Card for Overseas Koreans - Domestic Residence Card for foreign nationals of Korean descent ⚠️ Passports are not accepted as ID for online registration. To check ARC validity: hikorea.go.kr → Alien Registration Card validity inquiry

Self-activation is a method where the customer completes the activation request online without a counselor. Foreign customers can also use self-activation with koro. Please apply directly on the website or web (homepage). ⚠️ [Self-activation hours] 1. Number Transfer - 10:00–20:30 (Excludes Sundays and Korean traditional holidays) 2. New Signup - 09:00–22:00 (Excludes Sundays) 💡 Both number portability and new sign-up are completed through online self-activation.

Minors are restricted from online self sign-up, so activation must be completed through customer center consultation. Consent from a legal representative (guardian) is required when signing up. Required documents: - Legal representative ID - Family Relations Certificate issued within the last 3 months - Minor’s own ID (Alien Registration Card, etc.)

Number portability is available only after 90 days (3 months) have passed since the date of new activation, number portability, or ownership change with your current carrier. - Number portability applications are restricted within 90 days - Number portability from prepaid phones to postpaid is not available ⚠️ Number portability available hours: 10:00–20:30 (Excludes Sundays and Korean traditional holidays)

Yes, you can move to koro while keeping your existing number (010) through number portability (MNP). - Multi-carrier supported devices released after July 2014 - Galaxy S6, iPhone 6 or later models - LTE phones first activated for LG U+ - Phones purchased overseas need to check whether they support LGU+ frequency bands

For MVNOs, a mismatch error may occur because the brand name and the actual legal entity name are different. You can call 114 to check the carrier name first.

Telecom sign-up restriction is an identity theft prevention service, and you can remove it yourself. 1. Visit Msafer (msafer.or.kr) 2. Log in and request removal of the sign-up restriction service 3. After removal is complete, proceed with koro activation again 💡 You can also remove the sign-up restriction on the PASS web (homepage).

The main reasons for sign-up restriction are as follows. - Unpaid or overdue charges with another carrier - Telecom sign-up restriction service (Msafer) setting- Identity theft history - Foreigners with less than 30 days of stay remainingIf the restriction appears even though you have no unpaid charges, please contact koro customer center.

This can happen when an unpaid record remains in the carrier system. 1. Ask your previous carrier customer center to check unpaid charges 2. After confirming there are no unpaid charges, send it to koro customer center 3. A koro counselor will manually process activation

If delivery has not been dispatched yet, the address can be changed. - Send your application number and new address to koro customer center via KakaoTalk or phone - After dispatch, you need to request the change directly from the courier ⚠️ Address changes may be difficult after delivery dispatch, so please contact us quickly.

You do not have to activate immediately after receiving the USIM. However, there is an activation deadline, so please contact customer center quickly when you are ready. If activation within the deadline is difficult, contact koro customer center and we will guide you. ⚠️ If the activation deadline passes, you may need to apply again.

We recommend activating after entering Korea. - USIM can only be delivered to a domestic address - For activation inquiries, please contact us during customer center hours (weekdays 10:00~18:00)

You can check your current plan and usage on koro web (homepage) → My Page → Subscription history.

Speed units: - Mbps (megabits/second): Fast speed. YouTube HD video requires about 5Mbps - Kbps (kilobits/second): Slow speed. 1,000Kbps = 1Mbps QoS (speed limit after data is used up): It differs by plan and is largely divided into two types. 1) Products without QoS (data-blocking type)- Provided at Full LTE/5G speed, and data is automatically blocked when the allowance is used up 2) Products with QoS (speed-limited type)- There are four QoS types: 400Kbps / 1Mbps / 3Mbps / 5Mbps. - For unlimited data (last) products, full speed is provided up to the basic allowance, and after it is used up, unlimited data is still provided at QoS speed. (No extra charge)

After the basic data is used up, speed is limited or data is blocked depending on the plan. - Products without QoS: Data is automatically blocked when the basic data is used up - Products with QoS: You can continue using data at the QoS speed provided by each product (e.g., LTE 7gb+ then 1Mbps or below)

Please contact customer center through koro web (homepage) → My Page. - The changed plan applies from the 1st day of the next month - The current plan remains for this month - If you need an immediate change, please contact customer center

Yes, you can use the transit card feature through an NFC USIM. Please check two things. - Device : It must be a model that supports NFC USIM. (Some overseas devices may not support NFC USIM) - USIM type : When signing up on the koro site, you can choose and receive a regular USIM / NFC USIM. To use a transit card, you must choose an NFC USIM.

1. Web (homepage) → My Page → USIM information, check whether the inserted USIM number matches the activated USIM number 2. If the numbers are different, send the actual inserted USIM number to customer center and request a change 3. If the numbers are the same, insert the USIM into another device, turn the power off and on 1~2 times, then insert it again 4. If it is not resolved, contact koro customer center

Devices purchased overseas can also be used if they meet the requirements. - Supports LG U+ frequency bands (Band 1, 3, 5, 7, etc.) - VoLTE-supported device- Carrier lock must be unlocked ⚠️ Devices released in mainland China often do not support LGU+ frequencies.

It works with most recent smartphones, but some restrictions may apply. 1. Available: LG U+ LTE phones, Galaxy S6 or later / iPhone 6 or later 2. Needs caution: - Devices released in mainland China — may not support LGU+ frequencies - Carrier-locked devices — can be used after unlocking - Devices registered as lost — cannot be used

Mobile micropayments are not available yet. We are preparing this service to make things more convenient for you. Please stay tuned.

To prevent illegal spam messages, there is a limit on the number of messages that can be sent per day. 🟡 Please check and enter the koro SMS sending limit count.

1. When selecting a carrier, choose "MVNO" or "Other carrier" 2. In network selection, choose "LG U+" 3. Enter your name and birth date exactly as registered at sign-up 💡 You can check the network you are using in koro web (homepage) → My Page.

Yes, koro users can also use PASS certificates. - PASS web (homepage) → carrier selection → select "MVNO" → select "LG U+" ⚠️ For foreigners, verification may be restricted at some financial/public institutions.

- Real-time usage: koro web (homepage) → My Page → Usage lookup - SMS notice: automatic SMS notification when 50%, 80%, 100% of data is used - Billing details: web (homepage) → My Page → Billing history

koro is an MVNO using the LG U+ network. 1. In the carrier list, select "MVNO" or "Other carrier" 2. In network selection, select "LG U+" 3. Enter your name and date of birth exactly as registered at sign-up

Roaming is not available yet. We are preparing this service to make things more convenient for you. Please stay tuned.

1. Chat support (Channel Talk): Weekdays 10:00–18:00 (chatbot only on weekends and public holidays) 2. Phone support: Weekdays 10:00–18:00 (closed on weekends and public holidays) 3. Email: Accepted 24/7, with a reply the next business day 🟡 Email: support@koro.kr 🟡 Phone: 1877-0355

1. For number portability: your existing carrier line is automatically canceled. 2. For new sign-up: your existing carrier line remains active, and koro is activated with a new number. ⚠️ When moving your number, membership/benefits from your previous carrier end. If you have unpaid charges, please pay them before number portability.

[Prepaid plans] Credit or debit card [Postpaid plans] Credit card or bank transfer (automatically deducted on the monthly billing date)

[Prepaid plans] Payment is made immediately when you top up. [Postpaid plans] You can select a payment date depending on your payment method. 1. Card payments: Choose the 1st to 4th payment round (the date of each round may vary according to LG U+ policy). 2. Bank payments (automatic transfer): Choose the 15th / 18th / 22nd / 26th. - Your first month's bill is prorated from your activation date. - Check your bill on the website → My page → Billing history.

If you miss payment twice in a row, or if the unpaid amount is 70,000 Won or more and you miss payment once, service may be suspended for up to 3 months. If you do not pay within a certain period after the payment due date passes, service will be temporarily suspended. - If you pay immediately on web (homepage) → My Page → Unpaid charges, service will be restored automatically. 💡 You can check and pay unpaid charges directly on web (homepage).

Late fees occur from the day after the payment due date (D+1).An annual 2% late surcharge applies to unpaid charges. ⚠️ Please check your payment due date to avoid late fees.

Charges are billed prorated from the activation date to the end of the month. - Charge: monthly fixed fee ÷ number of days in that month × days used - Data: provided prorated in the same wayFree calls/texts are also calculated prorated in the same way. Example) For 10GB, 10GB = 10,240MB → 10,240 ÷ 31 × days used (calculation fractions are rounded up or rounded.)

Please contact koro customer center. - Changes must be completed before this month’s billing date to apply - If changed after the billing date, it applies from the next month

You can request a number change at no separate cost. We will guide you quickly after processing. However, in rare cases, the USIM may not be recognized after changing the number. In this case, please bring your ID and visit a nearby LGU+ directly operated agency or contact koro customer center. ⚠️ After changing your number, you cannot receive texts or calls sent to your previous number.

You can temporarily suspend your service from My page. - Up to 90 days per suspension, with 2 requests allowed per year - A basic fee still applies during suspension: 4,400 Won per month - You can suspend your service for up to 180 days per year

You can request cancellation through web (homepage) or customer center. - No-contract plans can be canceled without a penalty. - Charges for remaining days after cancellation will be refunded. ⚠️ Your phone number is returned when service is canceled. If you want to keep the number, please complete a number portability request first, then cancel.

We recommend canceling before returning to your home country. - You can still request cancellation through web (homepage) or email after returning. - However, charges continue until cancellation. - If you tell us your planned return date, we will automatically set the cancellation date.

Foreign customers of koro can currently activate their service without facial recognition. Facial recognition is required for Korean customers. However, during the current grace period, activation is possible even if facial recognition is not completed. If facial recognition fails - Face forward in a well-lit place and try again. - Remove masks, sunglasses, or anything covering your face. - Contact customer support if it fails 3 or more times.

After cancellation, it is kept for a certain period according to relevant laws and then securely destroyed. - Communication usage records: stored for 12 months, then deleted - Payment information: stored for 5 years (E-Commerce Act)

Roaming is not available yet. We are preparing this service to make things more convenient for you. Please stay tuned.

1. Turn airplane mode on and off (wait 1~2 minutes) 2. Turn the power off and on again 3. Change Settings → Network → Carrier automatic selection 4. If the methods above do not work, contact koro customer center

1. Turn airplane mode on and off 2. Check whether you have subscribed to the roaming add-on service (web (homepage) → My Page → Add-ons) 3. Check whether data roaming is allowed in device settings 4. If it is not resolved, contact koro customer center ⚠️ koro currently does not provide its own overseas roaming service. If you need data overseas, please use an LG U+ roaming product.