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Phonebook Navi is a free app that displays information retrieved from Phonebook Navi even for numbers not registered on your smartphone. Compared to carrier-provided spam call blocking apps, it offers significantly more information and higher accuracy in its detection, displaying not only spam call information but also information on companies and public institutions. (The app detects over 200 million incoming calls per month.) A free SMS filtering function to prevent phishing scams is also ava…

Phonebook Navi is a free app that displays information retrieved from Phonebook Navi even for numbers not registered on your smartphone. Compared to carrier-provided spam call blocking apps, it offers significantly more information and higher accuracy in its detection, displaying not only spam call information but also information on companies and public institutions. (The app detects over 200 million incoming calls per month.)
A free SMS filtering function to prevent phishing scams is also available. Phonebook Navi's SMS filtering function is highly effective in preventing information leaks and is used by many government agencies and corporations. (We also collaborate with various prefectural police departments and local governments.)

[Important] If your phone is set to use data communication for voice calls, incoming call display will not be available. (See bottom of page.)
[Important] The security of Phonebook Navi is explained at the bottom of the page (please see if you have any security concerns; it is explained in detail.)

[Required Settings]
To comply with the latest Google Play policies, Phonebook Navi must be set as a caller ID/spam call app on Android 10 and later. Doing so will enable caller ID display and blocking functions.

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About Phonebook Navi
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●Phonebook Navi is one of Japan's largest phone number information websites, used by over 30 million people monthly, and holds the No. 1 market share in Japan for both its phone number identification app and its user base (the app handles over 200 million incoming call identifications per month).
For approximately 18 years since 2008, we have specialized in phone number analysis and have identified over 23 billion phone numbers domestically and internationally. Only Phonebook Navi can identify phone numbers with its overwhelming amount of information and cutting-edge analysis technology.

Gain peace of mind and security with Phonebook Navi, which is available for free.

* #1 in Japan for the number of users of free number identification apps
* #1 in Japan for the number of users of phone number information websites
* #1 in Japan for the number of registered and listed phone numbers
* #1 in Google Play's popular communication apps category (July 2024)
* Phonebook Navi's system uses AI analysis technology to collect, analyze, register, and block information in real time from signals provided by tens of millions of users.
* Phone numbers for delivery services and recruitment personnel are also registered, making it easy to identify calls that "should be answered."
* Using the app is simple; just tap the icon after installation to launch. It automatically searches for the phone number upon incoming calls and displays it on the screen along with its spam level.
* Over 90% of Japanese delivery companies are registered.
* Phonebook Navi's number identification service is widely used by government agencies and companies.
* Phonebook Navi detects phone numbers associated with fraud and other crimes faster than police agencies.
* This information is extremely effective in preventing you from becoming a victim of crime.
* Installing Phonebook Navi in ​​advance is an effective crime prevention measure.

● Installing Phonebook Navi is also effective as a crime prevention measure.

The most important thing is not to answer calls from scammers and criminals.

Phonebook Navi has phone numbers registered that are used for crimes such as wire fraud, fictitious billing, and illegal lending, and blocks them.

● Even incoming calls received on a landline can be forwarded to your mobile phone, allowing you to identify the caller.

*Please forward calls to a smartphone with Phonebook Navi installed.

By using this method for incoming calls on your landline, you can proactively block scam and nuisance calls.

This is a strong crime prevention measure for elderly households, so we strongly recommend forwarding calls from landlines to smartphones.

● Phonebook Navi displays the "nuisance call rate" compiled from users of the app.

You can intuitively decide from the graph whether to reject the call or whether it is a call that needs to be answered.

● User reviews posted by other users are displayed when a call comes in.

When a delivery company contacts you to confirm you're home, normally only the phone number will be displayed because the delivery driver's mobile number isn't registered in the terminal. However, if you have Phonebook Navi installed, it will display something like "〇〇 Delivery Driver".

● Because Phonebook Navi is used by many users, it is also effective as a business card function for callers.

You can convey information such as the company name and what the company does before answering, giving the recipient a sense of security and increasing the answer rate.
For details, please see Enterprise Services (Caller Functions) in the app menu.


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　If you purchase an in-app purchase
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Purchasing an in-app purchase (premium version) will give you access to the following features.
* Automatic call blocking for spam calls
*The free version will notify you of potential dangers, but will not automatically block calls.
* Unlimited call history entries (you can search back in time)
*The free version has a history limit of 30 entries.
* In-app ad hiding function
* Cancel the judgment screen after a call ends
* View more detailed information on the details screen
[Important] If you make an in-app purchase, please configure the call blocking settings in the settings screen.
*Please check if the free version works as expected before purchasing. Refunds are not available after purchase.
*Users can manage their purchases via Play Store > Settings > Payments & Subscriptions > Subscription Settings.
*Reasons why we recommend the paid option
It automatically blocks fraudulent and solicitation calls, making it especially recommended for the elderly.
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About the App's Core Functions
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The Phonebook Navi app provides "caller ID, spam detection, and spam blocking" functions by sending the following data to the Phonebook Navi server (telnavi.jp):
1. Phone number (incoming number)
2. Call history
3. App crash log data
4. Identifiers related to each device, browser, and app
All data from 1 to 4 above is encrypted using SSL before transmission.
* After a call ends, you can manually send the caller's phone number, user reviews, and spam judgment to the Phonebook Navi server to provide the app/service's intended functions. This information is shared with third parties other than the app provider. (SMS judgment information is not made public)

[How to Stop Pop-ups (Foreground Services)]
You can stop the display of pop-ups by turning OFF both "Show information when receiving a call" and "Show information when making an outgoing call" in the settings screen. This operation will stop the foreground service.

　
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　　Regarding Inquiries
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If you encounter a problem, please contact us via the app's menu > Settings > Report a Problem. Support will assist you in resolving the issue.
　
　
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　　　Important Information
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●Incoming call display is not available for data communication calls
Calls made using data communication are not calls using a telephone line, so the incoming call display will not work. Some Rakuten Link and MVNO plans offer services that allow voice calls using data communication, but in those cases, the incoming call display will not work. Please check if your SIM contract plan uses a "telephone line" for calls (we cannot answer questions about SIM plans in support).

● About the Security of the Phonebook Navi App [Important]
The Phonebook Navi app does not classify incoming calls from phone numbers registered in your device's phonebook (contacts) as spam (because it considers phone numbers registered in your contacts to be important contacts to the user). To achieve this, it only accesses your phonebook (contacts) for verification when an incoming call is received. (This is used only within the device.)

Currently, Google Play app review is very strict, and there are particularly strict regulations regarding the handling of private data.

If an app requests unnecessary permissions or does not handle personal information appropriately within the app, it will not pass the review and cannot be published. The Phonebook Navi app is published in compliance with Google Play Developer Policies.

The reason why Phonebook Navi is used by many government agencies and companies is clear.

Phonebook Navi provides the highest level of security and crime prevention for your smartphone.