# Duo Phone Number - 2nd Line — Sideline for private call &sms

> Private second phone number for global calling and texting. (iPhone/iPad app by JUSI PTE.LTD..)

- Source: https://appshunter.io/ios/app/duo-phone-number-2nd-line/id1662423907 (this page in markdown: same URL + `.md`)
- Developer: [JUSI PTE.LTD.](https://appshunter.io/developer/1659814629)
- Category: Social Networking, Utilities
- Price: Free with in-app purchases
- Rating: 4.60/5 from 386 App Store ratings · 45 written reviews indexed
- Age rating: 12+
- Requires: iOS 13.0 · 108 MB
- Languages: American English, Arabic, French (France), German (Germany), Hindi, Indonesian, Japanese, Korean, European Portuguese, Russian and 5 more
- Released: 2023-01-31
- Data updated: 2026-09-05
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/duo-phone-number-2nd-line/id1662423907/reviews.md

## What is Duo Phone Number?

Duo Phone Number, a private 2nd Phone number app, is a calling and texting app that allows you to make calls and send text messages globally. It is also a phone number app without a traditional registration process. 
It also provides multiple phone numbers as a sideline on your smartphone to let you call and text for personal use and work separately.

Key features:
*Get a phone number and make free phone calls and send free texts with credits now
*Cost-efficient global calls to over 200 countries and regions
*Local phone numbers for you to choose: US, CA, UK
*Great call quality, HD voice over cellular data & wifi
*Caller ID enabled
*Two-way SMS/MMS enabled

- Why Duo Phone Number *
- REAL PHONE NUMBERS
Get a 2nd private phone number to protect your very own number. A real phone number - international texting - unlimited calling - secure number, disposable number, get phone number is so easy.

- CHEAP INTERNATIONAL CALLS
Call any mobile/landline phone numbers in over 200 countries and regions at super low rates. Get a US number, UK number or CA number, enjoy global calling and international texting using Wi-Fi and cellular phones. Just talk to others for longer at lower rates. 

- PRIVATE CALL & MESSAGE SMS
Safe and private WiFi calling and texting lets you chat and talk safely, Duo Phone Number is dedicated to providing you with a private second phone number for business, school, family or other personal contacts.

- CRYSTAL CLEAR CALLS
With the best phone line, Duo Phone Number ensures a high quality calling. You don't need to worry about bad reception, choppy voice or your call dropping, but a wonderful online calling experience.

- VARIOS CREDITS PLANS
Duo Phone Number offers different credit packages, and all the credits are valid for one year. Don't worry about credits getting expired. It's always there.

- Duo PHONE NUMBER PREMIUM
Duo Phone Number Premium offers you an ad-free experience, you can choose to buy a weekly or monthly premium, and you will get extra credits to make free calls and send free text messages.

In-App Subscription Details:
- Monthly subscription for premium service and additional numbers
- Payment will be charged to your iTunes account at confirmation of purchase
- Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of your current period
- Account will be charged for renewal within 24-hours prior to the end of the current period, at the purchase price listed when you confirm the subscription .
- You may manage your subscriptions and turn off auto-renewal by going to your iTunes Account Settings and then “Manage Subscriptions”
- No cancellation of the current subscription is allowed during active subscription
- Also see Terms & Conditions and Privacy Policy

Download Duo Phone Number and get a virtual number right now!

We're always excited to hear from you! If you have any feedback, questions, or concerns, please feel free to contact us via:
Email: duonumber@duoface.com 
Facebook: @DuoNumber
Instagram：@DuoNumber
Twitter：@DuoNumber

Privacy: https://duonumber.duoface.com/privacy.html
Terms: https://duonumber.duoface.com/terms.html

## Key features

- Private second phone number
- Global calls and texts
- Cost-efficient international rates
- HD voice quality
- Caller ID enabled
- Two-way SMS/MMS
- Ad-free premium option

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Premium Week | $3.99 | per 7 days |
| Premium Month | $3.99 | per month |
| Premium Week | $1.99 | per 7 days |
| Premium Month | $7.99 | per month |
| Basic Month | $1.99 | per month |
| Basic Week | $0.99 | per 7 days |
| DuoPhone 1Number + FreeCredits | $5.99 | per month |
| DuoPhone 1Number + FreeCredits | $2.99 | per 7 days |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Credit 100 | $1.99 | one-time |
| Credit 1000 | $9.99 | one-time |
| Credit 500 | $7.99 | one-time |
| Credit 5000 | $39.99 | one-time |


## What do users think of Duo Phone Number?

Overall sentiment: negative

**Pros**

- 👍 User-friendly interface
- 💬 Messaging and calling functionality
- 🎁 Free trial availability
- ⭐ Positive user experience for some users

**Cons**

- 💰 Expensive pricing and hidden charges
- 🐛 Messages and verification codes not received
- 📵 Non-functional phone numbers
- 🚫 Deceptive billing practices
- 😤 Poor customer service and refund issues
- 📱 App crashes and freezes
- 🎯 Misleading free trial terms
- ⚠️ Fake or already-used numbers
- 💸 Double charging for services

**Commonly reported bugs**

- Verification codes not arriving
- Messages failing to send or receive
- Phone numbers not working or unreachable
- Error 999 when attempting to use numbers
- SMS and call functionality non-operational despite purchasing credits
- OTP notifications not reaching the app
- Numbers already in use by other users
- App crashes and performance issues

**Most requested features**

- More free credits or coins
- Increased call allowances
- Better notification system for OTP codes
- Removal of excessive ads
- Improved number availability and validity

## Recent user reviews (10 of 45)

All indexed reviews: https://appshunter.io/ios/app/duo-phone-number-2nd-line/id1662423907/reviews.md

### 1/5 — Useless

*2026-07-12*

Not receiving any call or SMS

**Developer response:** Dear user,

Thank you for contacting us. We sincerely apologize for any inconvenience caused. Please provide the following information to duonumber@duoface.com so we can locate to the cause of the issue more quickly. Thank you.

Your Number:
Sender Number:
Messaging Time:
Your Time Zone:

### 1/5 — Дно

*2026-02-23*

Не приходят сообщения !!!!

**Developer response:** Уважаемый пользователь,

Благодарим вас за обращение. Приносим искренние извинения за доставленные неудобства. Пожалуйста, предоставьте следующую информацию на адрес duonumber@duoface.com, чтобы мы могли быстрее определить причину проблемы. Спасибо.

Ваш номер:
Номер отправителя:
Время отправки сообщения:
Ваш часовой пояс:

### 1/5 — DO NOT TRUST THIS APP!!!

*2025-10-08*

THEY OFFERED A FREE TRIAL SO I SUBSCRIBED AND THEN THESE GREEDY PIGS IMMEDIATELY CHARGED ME AND NOW WILL NOT REFUND THE MONEY!!!

**Developer response:** Dear user, 
  
On iPhone: 
If you've subscribed to credits/number using your Apple ID, refunds are handled by Apple, not us. To request a refund from Apple, please go here or follow the steps below: 
1. Go to iTunes on a computer 
2. Click on your Apple ID 
3. Select Purchase History 
4. Find the transaction and tap Report Problem

### 1/5 — The problem is that the verification code is not received. The program is not working 👎

*2025-05-27, version 2.5.1*

The problem is that the verification code is not received. The program is not working 👎

### 1/5 — No funciona

*2025-04-19, version 2.4.8*

Dos numeros contrate y dice error 999.  Deben arreglar o pedire reembolso

### 1/5 — Do not puchase!

*2025-03-05*

The phone number is not working. Unreachable. You cannot call or send sms either even if you buy credits!

**Developer response:** Dear user,

Thank you for contacting us. We sincerely apologize for any inconvenience caused. Please provide the following information to duonumber@duoface.com so we can locate to the cause of the issue more quickly. Thank you.

Your Number:
Sender Number:
Messaging Time:
Your Time Zone:

### 2/5 — Not functioning properly

*2025-03-03*

Recivers are unable to recive or dial despite having credits in my account

**Developer response:** Dear User,

Can you please send us your feedback through the app to help investigate and resolve the issue? Your feedback will generate an app log on our backend and our engineer relies on the app log to try to locate the problem. We’re sorry but we’re unable to figure out what’s happening to you if you can’t send us your feedback. Please follow the instructions below to submit your feedback. Thanks.
1.Click on "Me" in the bottom right corner - tap on "Customer Service" .
2. Find “Send” and submit your issue.
3. After submitting your feedback successfully, please do let us know.

### 2/5 — Need more free coins

*2025-01-17, version 2.4.8*

Thank

### 1/5 — Não recomendo

*2024-11-17*

além de pagar pelo número, tem que comprar créditos caros.

### 5/5 — Jabnm

*2024-10-30, version 2.4.8*

Jabnm

## Frequently asked questions about Duo Phone Number

### What does Duo Phone Number do?

Duo Phone Number provides a private second phone number that allows you to make calls and send text messages globally. It helps you separate your personal and work communications without needing a traditional registration process.

### What are the key features of this app?

Key features include obtaining a real second phone number, making free calls and sending free texts using credits, cost-efficient global calls to over 200 countries, local numbers (US, CA, UK), HD call quality, caller ID, and two-way SMS/MMS.

### How does the app make money?

The app is free to download and use with in-app purchases. Users can buy credit packages for calls and texts, and there is an optional premium subscription for an ad-free experience and extra credits. Subscriptions are managed through your iTunes account.

### Is this app compatible with my device?

While specific compatibility details are not provided in the description, the app is available for download, implying compatibility with standard smartphone operating systems. Payment is processed through iTunes, suggesting iOS compatibility.

### What are common use cases for Duo Phone Number?

Common use cases include protecting your primary phone number online, managing separate contacts for personal and professional life, making international calls at lower rates, and having a disposable number for temporary needs.

## Version history (last 5 releases)

### 2.5.1 — 2025-05-14

Bug fix

Thank you for using Duo Number! If you have any questions, please feel free to email us, and we would love to hear from you: duonumber@duoface.com.

### 2.4.8 — 2024-09-22

Bug fix

Thank you for using Duo Number! If you have any questions, please feel free to email us, and we would love to hear from you: duonumber@duoface.com.

### 2.4.7 — 2024-08-23

Bug fix

Thank you for using Duo Number! If you have any questions, please feel free to email us, and we would love to hear from you: duonumber@duoface.com.

### 2.4.6 — 2024-08-13

Fix the problem that may not work under the IPv6 network.

Thank you for using Duo Number! If you have any questions, please feel free to email us, and we would love to hear from you: duonumber@duoface.com.

### 2.4.4 — 2024-05-19

Get free credits and a free trial for calling and texting with Duo Phone Number!

Thank you for using Duo Number! If you have any questions, please feel free to email us, and we would love to hear from you: duonumber@duoface.com.

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## More apps by JUSI PTE.LTD.

- [Ring Phone Calls - JusCall](https://appshunter.io/ios/app/ring-phone-calls-juscall/id1324440110)
- [Duo Call - Global WiFi Call](https://appshunter.io/ios/app/duo-call-global-wifi-call/id1659814627)
- [Duo Messenger](https://appshunter.io/ios/app/duo-messenger/id6503286911)
- [WattCall - Global Calling](https://appshunter.io/ios/app/wattcall-global-calling/id6503596008)

All apps by JUSI PTE.LTD.: https://appshunter.io/developer/1659814629

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-05.*