12-month contract discount calculation

The discount rate is the same for 12- and 24-month contracts at 25% (-9,250 won/month), and with a 12-month contract, even if you cancel early, the amount you owe won’t exceed the discounts you received, resulting in zero net loss.

36-Month Total Cost Comparison

Current plan left unchanged: ₩2,520,000 (₩70,000/month) vs. 1G internet + partner budget mobile plan bundle (−₩13,200/month): ₩1,015,900 (average ₩28,219/month, ₩1.504 million less over 3 years)

Avoiding Pitfalls and Disputing Compensation Charges

How to identify the terms for 180 installments (15 years) of funeral service fees offered by a dealer + cancellation inquiry screen; checklist for returning four rental devices (including an AI speaker) with no charge for the 397,932 won fee

Key formula (12-month vs. 24-month optional contract): If you’ve finished paying off your device or use an unlocked phone and forget to renew your optional contract, 25% of your monthly base fee (₩9,250 per month, or ₩111,000 per year on the 5G Mini plan) simply goes to waste. When signing up, always choose a 12-month contract instead of a 24-month one. The discount rate is the same at 25%, and if you cancel within 1–3 months (90 days or less), you only have to pay back the discounts you received. From the fourth month onward, the repayment rate drops sharply, so no matter when you switch carriers, you’ll never be worse off than if you hadn’t signed up—your net loss is 0 won.

Official mobile and home internet bundle for budget phone plans: After activating a partner budget phone plan on the same network as your home internet, register the mobile and home internet bundle with customer service to receive an official monthly discount on your home internet bill while using the budget plan: 100M: -4,400 to -5,500 won; 500M: -9,900 to -11,000 won; 1G: -13,200 won.

A single formula for the total cost over 36 months: Calculating with (1~12개월 요금×12) + (13~36개월 요금×24) + 평일 설치비(36,300원) - 단독 사은품(170,000원) makes the differences transparent down to the last won: compared with keeping the current plan (Option 0: 2,520,000 won), applying only for a term discount (Option A: 2,187,000 won, saving 333,000 won), or signing up for a new 1G plan with another provider and bundling it with an affiliated budget mobile plan (Option E: 1,015,900 won, saving 1,504,100 won).

The truth behind the 397,932 won shown on the cancellation screen and how to identify equipment in the junction box: When you check the cancellation details for internet service after your three-year contract ends, the 397,932 won shown is not a cancellation fee (0 won). It is the maximum replacement cost if you return none of the equipment (modem: 100,695 won + router: 168,237 won + gateway: 30,000 won + Clova AI speaker: 99,000 won). If you return all four items to the pickup technician, the amount charged is exactly 0 won. Be sure not to touch the building equipment screwed to the metal plate in the junction box (HS-ONU10, UB-MD-01, and the PoE adapter).

Warning 1 / 180-payment funeral-plan installment bait

Mandatory payments totaling 1.194 million won after paying 100 won per month

Filter out prepaid installment plans (life care and funeral services) with terms that charge 100 won for installments 1–60, followed by 9,900 won per month for installments 61–180 (years 6–15), and choose only pure telecommunications promotions.

Warning 2 / 89 Mbps Bottleneck at the Wiring Cabinet

Freeing the Old Router from the Metal Shoe Cabinet Door

Diagnose with networkQuality why you’re getting only 89 Mbps (-73 dBm) in your room despite paying for 1 Gbps, and learn how to move the router out of the living room’s Ethernet port area during a new installation.

Shield 3 / 6 steps to set up the new service before canceling the old one, without interruption

No Internet Downtime at Home

Without canceling your existing internet first, switch over seamlessly in this order: complete the new internet installation → register the budget mobile carrier SIM and bundle → cancel the existing service and return all four pieces of equipment.

Script S1 (Apply for the 12-month optional contract plan with a 25% discount in just 3 minutes today, without switching carriers)

Hello, my device contract has ended for the mobile line I’m currently using, so I’d like to apply right away for the 25% plan discount with a 12-month contract instead of 24 months. Please text me the monthly discount amount and the expected contract end date once it takes effect. Also, I currently have a 1 Gbps home internet bundle on an older plan (-5,500 won). Please check whether it can be changed to the current “Easy Family Bundle” plan (-13,200 won) without renewing the contract.

Script S3 (Politely Declining a Contract Renewal Offer and Confirming the Return of All 4 Equipment Items at No Cost)

Thank you for informing me about the renewal benefits, but I’ve already completed a new installation with another provider’s partner bundle, so I’d like to proceed with submitting a cancellation request today, now that my three-year contract has expired. I’ve confirmed that since my contract has expired, there will be no early termination fee or removal fee. Please text me the pickup schedule so that when the technician visits, I can return all four items and have the unreturned rental equipment charge shown on My Page (a total of 397,932 won for the modem, router, gateway, and Clova AI speaker) waived, leaving a final bill of 0 won.

6 concise videos covering the essentials and a 3-question review quiz

Six lessons and an automatically graded quiz covering the five key sections of your bill, the 12-month contract discount formula, a comparison of partner budget mobile bundles and total costs over 36 months, and the six steps for returning equipment worth KRW 397,000 without service interruption.

2. Course Materials PDF, Page 5 (c16_telecom_bundle_ai_check_kit.pdf)

5-field bill diagnostic chart, 36-month total cost calculation table, 4-type classification table for equipment to return from the terminal box, 5 customer service scripts (S1–S5), 12-item checklist, and 3 AI prompts (P1–P3). Lesson 1 [Class Materials] attached.

3. Free Web Practice Simulator (W1) Available at All Times

Enter my mobile phone and internet bills to instantly calculate, without logging in, the 12-month savings from a contract discount, compare four 36-month options, and view waived rental equipment compensation fees.

Lesson 1

[Start with the finished result] Find out why you’re still paying 70,000 won every month after your contract has ended, then use the free web simulator (W1) to check the three-minute guide to reducing your bill with a contract discount and saving a total of 1.504 million won over 36 months.

Lesson 2

[Bill Breakdown] We break down the five key items you need to find on your carrier’s My Page: your contract discount, device installment payments, average data usage over the past 3 months (1.74GB), internet expiration date, and legacy bundle discount (-5,500 won).

Lesson 3

[Selective Contract Discount and Early Termination Fees] We’ll walk through the 3-minute application process on Smart Choice (*#06# IMEI) and use the official formula to prove why choosing a 12-month contract instead of 24 months means zero net loss if you cancel early.

Episode 4

[Bundles and 36-Month Comparison] We compare the official tables for LG U+’s Easy Family Bundle and SKB’s Affordable Bundle (1G, -13,200 won/month), as well as four options over 36 months (Option 0, A, C, and E), factoring in installation fees and promotional gifts.

Lesson 5

[Traps, Equipment, and Speed] Learn how to identify funeral service installment terms at dealerships (180 visits over 15 years), how to return four types of rental equipment for 0 won when the cancellation screen shows 397,932 won, and how to fix speed bottlenecks caused by an old router in the wiring cabinet (89 Mbps).

Lesson 6

[Practical Application] Enter the five figures from a redacted statement into AI prompts (P1–P3) to generate a comparison table, then wrap up with six steps for switching providers without interrupting internet access for even an hour and a card to persuade your family.

What the AI calculation prompts (P1–P3) help with

Diagnose five areas of waste on the bill and automatically calculate immediate savings from the 12-month contract discount (25%) (P1)
Compare the total cost over 36 months for four options—0, A, C, and E—and assess the 180-payment funeral mutual aid terms (P2)
Generate three lines to say to a cancellation representative and create a six-step schedule for a seamless switch to share with family (P3)

Tasks for the subscriber to handle directly through the app or in person

After verifying your identity in the carrier’s app or by calling 114, apply for a 12-month select contract discount and register a wired/wireless bundle by phone
Before canceling your existing internet service, complete the activation of your new service and request that the router be placed by the living room LAN port
Take photos of the serial numbers (S/N) of all four rental devices (modem, router, gateway, and AI speaker), then return them for pickup