---
title: Other mobile codes
description: "• Change PIN: ** 04 * [old pin] * [new pin] * [new pin] # • Show IMEI number: * # 06 # • Hide your number when calling someone: # 31 # phone number • 2nd call service: you…"
url: "https://www.fastfiber.be/en/support/other-mobile-codes/"
updated: "2023-01-26"
category: Mobile
---

# Other mobile codes

• Change PIN: ** 04 * [old pin] * [new pin] * [new pin] #
 • Show IMEI number: * # 06 #
 • Hide your number when calling someone: # 31 # phone number
 • 2nd call service: you are calling and someone else is trying to reach you. You can switch between conversations with this.
 Activate: *#43#
 Deactivate: #43#