mudar número de telefone

This translates as:

I want to change my phone number.

Hi 5766786,

I understand you wanted to change the phone number associated with your Razer ID.  Please follow the steps here as your guide. If you need further help, send me a PM the following information for account verification. Also, please note that Razer Insider support is only available in English, so kindly post your questions or concerns in English on all forums.

Razer ID:
Email address associated with your Razer ID:
Date of Birth:
Full Name:
Old phone number:
New phone number:
Country:

*Thread locked to curb conversation to PM.