eSIMガイド 2026

APN SETTINGS GUIDE - SB SIM CARD (IPHONE & ANDROID)

CTS

cts nguyen

2024.09.25

読了時間 5分

APN SETTINGS GUIDE - SB SIM CARD (IPHONE & ANDROID)

Official SoftBank Network

APN Settings Guide – SoftBank SIM Card (iPhone & Android)

Complete APN configuration guide for C.T.S SoftBank SIM Card. Follow the step-by-step instructions below to connect to 4G / 5G within 2 minutes.

Apple iOS (iPhone)

Auto Profile 5 Steps

→

Android Smartphones

Manual APN 4 Steps

→

SIM card inserted into tray 1

Connected to Wi-Fi

Old SIM profiles deleted

iPhone Configuration

5 Steps

Download the SoftBank Profile

Connect your iPhone to Wi-Fi. Scan the QR code below, or tap the download button to open the profile in Safari.

Download SoftBank APN Profile

Use Safari: If you opened this page in Facebook, LINE, Zalo, or Messenger, tap (•••) and choose Open in Safari before downloading the profile.

Allow the Download & Check Old Profiles

When Safari asks to download the configuration profile, tap Allow, then Close. Next, open the profile settings:

Settings › General › VPN & Device Management

If an old carrier profile is listed, tap it, choose Remove Profile, and enter your passcode. Then continue to the newly downloaded SoftBank profile.

Open the Downloaded Profile

Go to Settings → General → VPN & Device Management, select CTS_SB_APN, then tap Install at the top right.

Step 4: Select CTS_SB_APN; Step 5: Tap Install on iPhone

Confirm Installation & Toggle Airplane Mode

Follow the prompts to tap Install twice and complete the profile setup. Then toggle Airplane Mode on and off once to refresh the connection.

Steps 6 to 8: Confirm installation and toggle Airplane Mode on iPhone

Turn Off Wi-Fi & Activate the SIM

Settings › Cellular › Cellular Data: ON

Turn Wi-Fi OFF and wait a few minutes for the SoftBank network to activate. The signal bar should change to 4G or 5G.

Turn off Wi-Fi to activate the iPhone SIM

Setup complete! You are now connected to the SoftBank network.

Android Configuration

4 Steps

Open Mobile Network Settings

With your SoftBank SIM inserted, open Settings, choose Network & Internet (or Connections on some phones), then tap Mobile network.

Settings › Network & Internet / Connections › Mobile network

Steps 1 and 2: Open Network & Internet and Mobile network settings on Android

Open APN Settings & Add a Profile

From Mobile network, open Access Point Names, then tap the + icon in the top-right corner to create a new APN.

Settings › Mobile Network › Access Point Names › +

Steps 3 and 4: Open Access Point Names and tap the plus icon on Android

Add New APN Profile

This is Step 5 in the image guide. Enter these values in the new APN form:

Name plus.4g

APN plus.4g

Username plus

Password Current

Authentication Type CHAP

* Leave all other options unchanged at their default values.

Step 5: Enter the SoftBank APN values on Android

Save & Select the New APN

Tap Menu (⋮ or More) › Save › Select "plus.4g"

After saving, select plus.4g from the APN list. Turn Mobile Data ON and wait for the 4G/5G indicator. If it does not appear, toggle Airplane Mode or restart your phone.

Steps 6 and 7: Save and select plus.4g on Android

Connected! Your SoftBank high-speed cellular connection is ready to use.

Frequently Asked Questions

Signal bars show, but no 4G/5G icon or data connection? +

1. Ensure Wi-Fi is turned completely OFF.
2. On Android, verify that the radio button next to "plus.4g" in APN settings is selected.
3. Turn Airplane Mode ON for 10 seconds, then turn it OFF, or restart your phone.

iPhone: Profile will not download or shows an error? +

Confirm you are accessing the download link from Apple Safari (not in-app browsers like Facebook or Line). Also verify that old profiles from previous carriers have been removed under Settings › General › VPN & Device Management.

Device indicates "SIM Not Supported" or "SIM Locked"? +

This indicates your device is locked to your previous carrier (SoftBank, au, docomo, or international carrier). Please contact your original carrier to request an official SIM unlock.

How do I check my remaining high-speed data quota? +

Your monthly high-speed data quota renews each calendar month based on your SoftBank subscription. For balance check or plan renewal, message our support team anytime.