Is it possible to choose a phone number?

Good morning
Yes it is possible, but you have a cost, you can contact moderation by sending a private message with your customer number for more information to ​@Fórum , or wait for moderation to respond to this message, ​@João H. ou ​@Mário P. 

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Tenha um bom dia.

Ok I will pay cost of sim card.kindly tell me details. 

As i said, you must contact moderation for more details, send private message to ​@Fórum clicking here

Hello ​@Muhammad Faheem Nasir,

Thank you for reaching out to us.

​@Renato Gomes shared a good help on this. 
You can ask to have a specific number. First you need to already have a NOS SIM card, and then ask to change for a specific one.

Thank you