# Get the Mobile Number of Viber & Telegram users

**URL:** <https://community.yellow.ai/t/get-the-mobile-number-of-viber-telegram-users/917>\
**Category:** Channels\
**Tags:** others\
**Created:** [November 16, 2020, 6:42am UTC](https://community.yellow.ai/t/get-the-mobile-number-of-viber-telegram-users/917 "2020-11-16T06:42:04Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Janani\_Prakash](https://yyz1.discourse-cdn.com/flex035/user_avatar/community.yellow.ai/janani_prakash/32/546_2.png) [@Janani\_Prakash](https://community.yellow.ai/u/Janani_Prakash)\
**Post date:** [November 16, 2020, 6:42am UTC](https://community.yellow.ai/t/get-the-mobile-number-of-viber-telegram-users/917/1 "2020-11-16T06:42:04Z")

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Hi,

I have enabled my Bot on WhatsApp, Viber & Telegram.

I could retrieve the WhatsApp User’s Mobile Number using the ‘**app.sender()**’ but the same isn’t applicable for Viber or Telegram as they have a unique User ID.

PFB Screenshots of the same.

![ID](https://canada1.discourse-cdn.com/flex035/uploads/yellowmessenger1/original/1X/325e645ce83359f729c2980e1b3e8fe5201c89be.png)

**I need to know the Mobile Number of Viber & Telegram Users for enabling services like OTP, etc.**  
Kindly let me know a way to get this done.

Thanks in advance.

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<div class="post-metadata">

**Author:** ![Lokeshwaran\_K](https://yyz1.discourse-cdn.com/flex035/user_avatar/community.yellow.ai/lokeshwaran_k/32/566_2.png) [@Lokeshwaran\_K](https://community.yellow.ai/u/Lokeshwaran_K)\
**Post date:** [November 17, 2020, 6:11am UTC](https://community.yellow.ai/t/get-the-mobile-number-of-viber-telegram-users/917/2 "2020-11-17T06:11:18Z")

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Hi Janani,  
Two things here,

1. Viber and telegram doesn’t expose the user’s mobile number, you need to prompt the user to enter the mobile number and send it to them
2. `app.sender` is not a function, its a property instead. It can be used by simply `app.sender` instead of `app.sender()`