# Contacts Prefix Fixer

> Change your prefix contact's phone number

Canonical page: [https://chrome-stats.com/d/lhc.app.PrefixNumber](https://chrome-stats.com/d/lhc.app.PrefixNumber)

## Overview

- **ID:** `lhc.app.PrefixNumber`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** L.H.C
- **Category:** TOOLS
- **Downloads:** 473,429
- **Rating:** 4.43 / 5 (907 ratings)
- **Version:** 1.1
- **Last updated:** 2024-11-09
- **First published:** 2016-10-31
- **Publisher country:** VN
- **Size:** 4.73 MB
- **Data as of:** 2026-09-14
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=lhc.app.PrefixNumber)
- **Privacy policy:** [https://sites.google.com/view/contactprivacy/edit-prefix-phone-number](https://sites.google.com/view/contactprivacy/edit-prefix-phone-number)

## Description

**Contacts Prefix Fixer** is a Chrome extension designed to help you edit and standardize the prefix of phone numbers saved in your contacts. Whether you want to add international prefixes like +84 to local numbers or fix inconsistencies caused by merged contact sources, this tool simplifies the process.

Many mobile plans, such as AT&T Prepaid, require dialing strict 10-digit numbers. Prefix prefixes or local 7-digit numbers can interfere with plan renewals or cause unnecessary charges. This extension automates prefix correction and removes duplicate numbers within the same contact to prevent such issues.

As an upgraded version of the previous "Change Prefix phone number" app, Contacts Prefix Fixer supports more CPU types and provides a robust, user-friendly solution for managing your phonebook efficiently.

## Rankings

- #102,965 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_ADSERVICES_AD_ID`
- `android.permission.ACCESS_ADSERVICES_ATTRIBUTION`
- `android.permission.ACCESS_ADSERVICES_TOPICS`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.FOREGROUND_SERVICE`
- `android.permission.INTERNET`
- `android.permission.READ_CONTACTS`
- `android.permission.WAKE_LOCK`
- `android.permission.WRITE_CONTACTS`
- `com.google.android.gms.permission.AD_ID`

## Review summary

Reviews consistently praise the app for quickly normalizing country codes and prefixes across large contact lists, saving hours of manual work. Users emphasize speed, simplicity, and reliable results, including better WhatsApp/caller ID display and smartwatch compatibility. A caveat mentioned is to use the tool carefully to avoid unintended changes.

### Pros

- Mass editing of all contact prefixes to fix country codes quickly
- Saves significant time and avoids manual editing
- Fast, simple, and easy to use
- Fixes WhatsApp contact display and caller ID issues
- Works with smart devices (e.g., Samsung Galaxy Watch) and across devices

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Source: [Chrome-Stats](https://chrome-stats.com/d/lhc.app.PrefixNumber)