指南

New Contract vs Upgrade vs MNP vs Plan Change

Four procedures people mix up. A side-by-side comparison.

菜单、标签和指南说明均以所选语言显示。运营商名称、套餐名称及其他专有名称可能保留官方写法。
最后确认:2026-08-29 (JST)申请方式和支持选项可能变化。申请前请务必查看最新官方信息。

Four procedures, side by side

New Contract
通信运营商
New
Number
Usually new
设备
Optional
Device Upgrade
通信运营商
Same
Number
Same
设备
New
MNP
通信运营商
Changes
Number
Kept
设备
Optional
Plan Change
通信运营商
Same group
Number
Same
设备
Unchanged
Plan Change is not the same as MNPMNP changes your carrier and keeps your number. Plan Change keeps your carrier or brand group and only swaps the pricing plan. Different teams, different rules.

Changing plans within the same mobile group

Same company from the outside — different teams and rules inside.

Main brandFull store support, higher price
Online-focused planSame network, online procedures
Low-cost brand / sub-brandOwn shops or online, lower price
Moving between plans in the same mobile group is often possible, but the method and any fees depend on the specific services. Check the official pages before you rely on a particular route.

One plan can have several routes in

Direct online application

You sign up on the plan's website or app.

MNP switch-in

You apply as an MNP customer, keeping your number.

Plan change from an existing line

You already have a line in the same group and switch plan in the app.

In-store web assistance

Staff help you operate the online application. A fee may apply.

Some electronics-store counters

A limited set of shops may accept applications for certain brands.

One plan can have several routes in. Which routes are open — and whether they cost anything — changes over time.
Related guides

Related guides