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Illustration of delayed phone notifications on a smartphone

Not Getting Phone Notifications, or Are They Delayed? 6 Causes and a Full iPhone/Android Settings Checklist

Not getting notifications? The cause may be hiding in your phone's settings. Let's walk through six common culprits, from Focus mode to battery settings, and how to fix them.

2026.03.166 min佐藤理香

Illustration of LINE call notifications not ringing on a phone

スマホ・アプリ

LINE Calls Not Ringing or No Call Notifications? 6 Causes and Fixes to Try Now [iPhone & Android]

LINE calls can stop ringing for several reasons, from notification settings and Focus mode to battery saver features. Here are six common causes and clear iPhone and Android fixes to try.

2026.03.168 min佐藤理香

LINE chat transfer backup on a new smartphone

スマホ・アプリ

LINE Chat History Disappeared After Switching Phones? 5 Transfer Mistakes and the Right Backup/Restore Steps [2026]

Switched phones and your LINE chat history disappeared? It happens more often than you'd think. Here are the 5 most common causes, plus the right way to back up and restore your chats.

2026.03.158 min佐藤理香

Common causes and fixes when PayPay won't let you add money

スマホ・アプリ

Can't Add Money to PayPay or Pay with Your Balance? 7 Causes and Quick Fixes [2026]

If PayPay won't let you add money or your balance payment won't go through, start by finding the cause. Here's how to check 7 common issues, from bank maintenance and limits to unfinished eKYC.

2026.03.149 min佐藤理香

iPhone Screen Time lock being bypassed on a smartphone

スマホ・アプリ

Can Kids Bypass iPhone Screen Time? 8 Common Loopholes and Settings Parents Should Fix [2026 Edition]

So your child is getting around Screen Time? Date changes, app reinstalls... there are several common loopholes. Let's walk through the fixes together.

2026.03.148 min佐藤理香

New Mac connected to an iPhone with music disappearing

スマホ・アプリ

Did All Your Music Disappear After Connecting Your iPhone to a New Mac? 5 Finder Sync Causes and How to Restore It

Ah, so all your music vanished after connecting your iPhone to a new Mac? Finder sync settings may be the trap. Let's walk through five common causes and how to restore your songs with iCloud or a library transfer.

2026.03.147 min佐藤理香

Illustration of a new smartphone freezing and running slowly

スマホ・アプリ

New Phone Slow or Freezing? 6 Reasons Your Brand-New Phone Feels Laggy and Fixes You Can Try Yourself [iPhone & Android]

Got a new phone that's already slow or freezing? From post-transfer cleanup to low storage, background apps, and hardware defects, let's walk through six common causes and fixes.

2026.03.148 min佐藤理香

Image of how to deal with the problem of iPhone alarm not sounding

スマホ・アプリ

iPhone alarm not ringing/no sound? 7 causes and reliable solutions to prevent oversleeping [Compatible with iOS 26]

Explains 7 reasons why the iPhone alarm does not ring or becomes silent (sound settings, volume, Bluetooth, screen gaze recognition, focus mode, standby, iOS bugs) and reliable solutions for iOS 26. We also introduce insurance techniques to prevent oversleeping.

2026.03.13佐藤理香

Image illustration of transferring eSIM when changing smartphone model

スマホ・アプリ

Can't transfer eSIM when changing smartphone model? Correct transfer procedure for iPhone/Android and what to do if it fails

Explaining the causes and solutions for the problem of not being able to transfer eSIM when changing smartphone models. We have summarized the steps for iPhone/Android eSIM quick transfer, 5 reasons for failure, and carrier-specific procedures for reissuing eSIM in an easy-to-understand manner.

2026.03.13佐藤理香

Image of smartphone chat app communication being restricted on Wi-Fi at school/work

スマホ・アプリ

Can't send LINE or Discord via Wi-Fi at school or work? How communication restrictions work and 4 ways to deal with them yourself

The reason you can't use LINE or Discord even though you're connected to Wi-Fi at school or work is because of filtering (communication restrictions) on the network side. Explains the mechanisms of port blocking, DNS filtering, and app-level control, as well as four countermeasures you can take, such as switching to mobile data and using the web version.

2026.03.11佐藤理香

Image illustration of smartphone screen being black when screenshots are prohibited

スマホ・アプリ

Can't take screenshots with your smartphone? Screen turns black? Reasons for prohibiting screenshots for each app and 5 solutions [iPhone/Android]

If the screenshots on Netflix or banking apps turn black, it is not a malfunction of your smartphone. We will explain the reasons for prohibiting screenshots for each app (DRM/FLAG_SECURE) and 5 solutions for preserving screen information for iPhone and Android.

2026.03.11佐藤理香

Image illustration of an error that prevents you from posting to X (Twitter) from your smartphone

スマホ・アプリ

Can't post or reply to X (Twitter) from your smartphone? 7 causes and solutions you can try now [iPhone/Android]

Explains 7 reasons why you can't post or reply to X (formerly Twitter) from your smartphone and how to deal with it. Covers 7 patterns: server failure, communication environment, Android permission reset, cache, posting restrictions, account lock, and app bugs. Compatible with both iPhone and Android.

2026.03.10佐藤理香

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