5.1 The categories, names, and details of each service provided under this Service shall be as specified in these Terms and Conditions.

5.2 The Company may change the categories, names, and details of each service without prior consent from the Customer.

6.1 Contact channels and operating hours for general service inquiries are as follows:

6.2 In the event that the Service becomes unavailable due to system outages or other reasons, the outage reporting center and hours are as follows:

7.1 The Customer must apply for the Service by agreeing to the Terms and Conditions of Service, completing the application form prescribed by the Company or its Agent, and submitting it to the Company or its Agent. If the Customer does not accept the Terms and Conditions, they will not be able to use the Service.

7.2 Submitting the application under Clause 7.1 via website forms or electronic files through email/fax is permissible only upon approval by the Company.

8.1 The Service Agreement based on the Terms and Conditions of Service shall be deemed completed once the Company accepts the application submitted in accordance with the preceding clause.

8.2 The Company shall notify the Customer of the “Service Start Date”, User IDs, Passwords, and other necessary information required for Service usage in writing or via email after the Service Agreement has been established.

8.3 The Customer is deemed to have confirmed the establishment of the Service Agreement upon receiving the aforementioned notification and is obligated to pay service fees regardless of whether the Service is actually used after the “Service Start Date”.

9.1 The Company may reject a Service application submitted under Article 7 (Service Application) if the Customer falls under any of the following circumstances:

• There is a risk that the Customer may fail to perform obligations under these Terms and Conditions.
• The Customer provided false information in the application form.
• There is a risk that using the Service may damage the reputation of the Company or the Service.
• Providing specialized services requested by the Customer, or installing and maintaining dedicated equipment, presents extreme difficulty.
• The Customer has engaged in, or is likely to engage in, actions falling under Article 17 (Service Suspension).
• The Customer is a minor and has not obtained consent from a parent or legal guardian.
• In any other case where the Company deems the provision of Service inappropriate.

9.2 In the event that the Company rejects an application under Article 7, the Company shall notify the Customer in writing.

10.1 The Customer may use the Service starting from the “Service Start Date” specified under Article 8 (Commencement of Service).

10.2 Each service item has its own Minimum Usage Period and Contract Unit Period, as defined in these Terms and Conditions.

10.3 The service period and minimum usage period specified in the preceding paragraph shall commence on the first day of the month following the date the Service Agreement is established under Article 8.

10.4 Upon expiration of a service period, the contract for that service shall automatically renew, with the new term starting on the day immediately following the end of the previous Contract Unit Period.

11.1 Customers wishing to modify service details must submit a service modification request by filling out the required information in the change request form prescribed by the Company or its Agent and submitting it to the Company or its Agent.

11.2 Provisions in Article 7 (Service Application) through Article 10 (Service Period) shall apply mutatis mutandis to the application, acceptance, rejection, and period of service for service change requests.

The Customer must promptly notify the Company in writing of any changes to the information provided in the Service application (including change requests). The Company shall not be liable for any damages incurred by the Customer resulting from delayed notification of such changes.

13.1 If the Customer wishes to terminate the Service, they must notify the Company in writing at least 1 month prior to the desired termination date, as separately specified by the Company.

13.2 If the period between the notice date and the termination date is less than 1 month, the last day of the month following the notice date shall be considered the official termination date.

13.3 Notwithstanding the preceding clauses, if the Service cannot be provided due to reasons under Article 18 (Service Suspension) or Article 21 (Service Restriction), and the Company determines that the Customer cannot achieve the contractual purpose, the Customer may terminate the Service via written notice. In this case, termination takes effect on the date the Company sends written acknowledgment to the Customer.

13.4 If the Service is terminated prior to completing the Minimum Usage Period defined in Article 10 (Service Period), the Customer must pay a lump-sum amount covering the remaining duration from the day after termination until the end of the Minimum Usage Period.

14.1 Service fees shall be as specified in the Fee Schedule.

14.2 In the event that Service provision is suspended due to any reason under Article 17 (Service Suspension), the period of suspension shall still be considered as active service rendered by the Company.

14.3 If the Service Agreement is terminated under Article 17, the Customer forfeits the benefit of time under the contract and must immediately settle all outstanding debts under these Terms. The Customer has no right to offset such debts against the Company or its assignees.

14.4 If Customer usage exceeds the scope specified in the Service Agreement, the Company may adjust contract terms upon written notice and charge updated service fees accordingly.

14.5 In cases where the Customer fraudulently avoids paying service fees, the Customer shall pay a penalty equal to double (2 times) the amount owed in addition to the original fee.

14.6 In the case of overdue payments or penalties, the Customer shall pay default interest at the rate of 14.6% per annum for the delayed period.

14.7 Upon termination of the Service for any reason, service fees received by the Company will not be refunded.

15.1 The Customer must pay service fees as specified in Article 14 (Service Fees) by the due date and method indicated on invoices issued by the Company or its Agent. The Customer is responsible for bank transfer fees, VAT, and any other expenses related to the payment.

15.2 Any dispute between the Customer and financial institutions or third parties regarding payments shall be resolved directly between the involved parties, and the Company assumes no liability for such disputes.

16.1 The Company reserves the right to revise service fees without prior consent from the Customer.

16.2 The Company shall inform the Customer of revised fees via methods deemed appropriate (including website announcements and email notifications).

16.3 Applying for or continuing to use the Service following a fee revision constitutes acceptance of the new fee rates.

17.1 The Company may suspend Service to the Customer for a specified period under the following circumstances:

• Failure to pay service fees, penalties, or late charges after the due date.
• Providing false information in the service application form.
• Causing excessive burdens or severe direct/indirect damage (including damage to equipment or data) to the Company or third parties.
• Violations of these Terms that obstruct or threaten to obstruct the operations or telecommunication facilities of the Company or its designated contractors.
• Breaching provisions under Article 28 (Personal Responsibility) through Article 32 (Prohibited Actions).
• Being subject to seizure, provisional execution, auction, or enforcement under tax/public charge laws.
• Petitions for bankruptcy, civil rehabilitation, corporate reorganization, or third-party filing of such proceedings.
• Violating laws, public order, or moral standards through Service use, or risk of such violations.
• Inability to verify Customer details following a change in payment method.
• Failing to remedy a breach of these Terms despite notice from the Company.
• Any other situation where the Company deems Service provision inappropriate.

17.2 The Customer must notify the Company in writing immediately if any event in Clause 17.1 occurs or is likely to occur.

17.3 The Company may terminate the Service Agreement immediately if the Customer meets any condition in 17.1. Such termination shall follow Article 13 (Service Termination by Customer) mutatis mutandis.

17.4 Upon agreement termination under this article, the Customer must compensate the Company for any losses or damages caused by said termination.

18.1 The Company may suspend all or part of the Service in the following cases:

1. When unavoidable due to maintenance or construction of telecommunication facilities by the Company or its contractors.
2. When performing routine or necessary Service maintenance.
3. In the event of telecommunication facility failures.
4. When telecommunication services are terminated or disrupted by telecommunication carriers or partners.
5. Any other unavoidable circumstances determined by the Company.

18.2 For suspensions under 18.1 (1), the Company will provide at least 14 days’ advance notice. For suspensions under 18.1 (2)–(5), advance notice detailing reasons and scheduled duration will be provided via appropriate means (website announcements, emails, etc.). In emergencies, the Company may notify Customers using methods deemed appropriate at its discretion.

18.3 The Company shall not be liable for any losses or damages suffered by the Customer due to partial or total Service suspension under this Article.

18.4 The Company assumes no responsibility for damages resulting from Service suspension.

19.1 To ensure smooth operation, the Company conducts Regular Maintenance and Planned Maintenance.

19.2 Regular Maintenance is scheduled daily between 21:00 and 06:00 (UTC+7). Short delays of a few seconds or momentary service interruptions may occur during this window.

19.3 Planned Maintenance is conducted at pre-announced dates/times and may cause temporary Service interruptions. Emergency Maintenance is carried out as urgently needed to preserve Service integrity and may also cause temporary interruptions.

20.1 The Company may postpone the Service Start Date specified under Article 8 in the following situations:

• When setting up custom features or installing/maintaining specialized equipment requested by the Customer is unusually difficult.
• When telecommunications providers or contractors delay providing required connections.
• Other unavoidable reasons determined by the Company.

20.2 If Service commencement is postponed, the Company shall notify the Customer via methods it deems appropriate (including website announcements or email).

The Company may limit or suspend Service usage to prioritize urgent public interest communications during natural disasters, emergency situations, or when extreme network congestion poses severe risks to system stability.

22.1 The Company may discontinue all or part of the Service at its sole discretion without requiring Customer consent.

22.2 In the event of Service discontinuation, the Company shall provide at least 2 months’ advance notice via appropriate channels (website posting, email, etc.).

22.3 The Company shall not be held liable for any loss or damage incurred by the Customer resulting from Service discontinuation under this Article.

All copyrights, technical know-how, and intellectual property rights related to the software and materials provided to the Customer under these Terms (“Software”) belong exclusively to the Company or third-party licensors who granted usage rights to the Company.

The Company may back up Customer Data at its discretion as a precautionary measure against potential system failures.

25.1 The Company will implement appropriate organizational, technical, physical, and administrative security measures within a reasonable scope to prevent data loss, damage, leakage, or unauthorized use.

25.2 The Company may access Customer Data under the following circumstances:

• To maintain stable Service operations and resolve technical issues.
• To perform backup operations under Article 24 (Data Backup).
• When required by law or orders from authorized governmental authorities.
• When explicit written consent (including email) is granted by the Customer.

25.3 Data accessed with Customer consent shall be treated as confidential under Article 33 (Protection of Personal Information).

25.4 The Company assumes no responsibility for the accuracy, completeness, or legality of Customer Data.

The Company may delete relevant data or suspend data transfers without prior consent if Customer Data volume exceeds established limits or violates Article 17 (Service Suspension). The Company accepts no liability for damages resulting from such actions.

27.1 Upon contract termination or cessation of Service usage for any reason, the Company reserves the right to immediately delete all Customer Data, Software, and related files.

27.2 The Company shall not be liable for any loss or damage incurred by the Customer due to data deletion following contract termination.

28.1 The Customer assumes full responsibility for all activities conducted under their account and the resulting consequences, whether initiated directly by the Customer or not.

28.2 The Customer is solely responsible for all data transmitted through the Service.

28.3 If the Customer causes damage to other users or third parties while using the Service, the Customer must resolve the issue and compensate for damages at their own expense.

28.4 Disputes, claims, or inquiries raised by third parties regarding Customer activities must be handled and resolved entirely at the Customer’s sole cost and responsibility.

28.5 If the Customer causes damage to the Company under 28.1–28.4, the Customer shall fully indemnify the Company for all associated losses.

28.6 The Company bears no liability for losses or damages arising under provisions 28.1 to 28.4.

29.1 The Customer must comply with the following rules regarding Software use:

• Do not lend, transfer, sublicense, or distribute the Software to third parties in any manner.
• Manage and safeguard the Software with the care of a prudent manager.
• Use the Software strictly for its intended Service purpose and not for unauthorized uses.

29.2 If Software is lost or damaged due to a breach of these rules, the Company or its designated contractor shall perform recovery/repairs at the Customer’s expense.

30.1 The Customer is solely responsible for maintaining the confidentiality and security of User IDs and Passwords issued by the Company (“Account Credentials”).

30.2 The Customer shall not permit unauthorized third parties to use their Account Credentials.

30.3 The Customer must notify the Company immediately if Account Credentials are stolen or compromised and comply with instructions provided. The Company is not liable for losses caused by credential theft or unauthorized third-party use.

31.1 The Customer must ensure that contact email addresses provided on application forms or updated under Article 12 remain valid and functional to receive Company notifications.

31.2 The Customer shall respond to inquiries or requests sent by the Company without delay.

31.3 The Company may send service updates or promotional information regarding business partners to the registered contact email. The Customer is responsible for managing storage space for receiving such emails.

32.1 Customers must not engage in any of the following prohibited actions while using the Service:

• Violating laws, regulations, or committing acts contrary to statutory provisions.
• Defamation, discrimination, or infringement upon the honor, privacy, or rights of the Company or third parties.
• Collecting personal data of third parties through fraudulent or illegal means.
• Unauthorized disclosure of third-party personal information without explicit consent.
• Infringing upon copyrights or intellectual property rights of the Company or third parties.
• Violating legally protected rights or interests of the Company or third parties.
• Criminal acts, soliciting criminal behavior, or aiding illegal activities.
• Intentionally providing false information.
• Violations of election laws.
• Operating or participating in pyramid/Ponzi schemes.
• Distributing obscene material, child pornography, or content violating child protection laws.
• Interfering with or disrupting Service operations.
• Disrupting third-party communications.
• Unauthorized access, hacking, cracking, or launching attacks against Company/third-party infrastructure, or distributing tools promoting such actions.
• Sending unsolicited commercial spam, harassing emails, or junk emails.
• Distributing viruses, malware, or software designed to damage third-party operations.
• Altering connection settings to force high-cost international calls or unauthorized networks.
• Falsifying or deleting third-party data accessible via the Service.
• Unauthorized usage of third-party account credentials.
• Any actions violating public order, moral standards, or legal rights of others.

32.2 Prohibited actions include soliciting, aiding, or linking to content that facilitates the aforementioned activities.

32.3 If the Customer commits any prohibited acts, the Company may suspend Service under Article 17 and demand reimbursement for operational costs, complaint resolution expenses, and damages incurred.