Hi @Asadbek Fayziev ,
Source: https://azure.microsoft.com/en-us/free/free-account-faq/
All you need is a phone number, a credit card or a debit card (non-prepaid), and a Microsoft account or a GitHub account. Only credit cards are accepted in Hong Kong and Brazil.
Prepaid Cards might not work for register an Azure Trial Subscription.
We’ll never charge you unless you decide to move to pay-as-you-go pricing. If you move to pay as you go, you’ll only be charged for services that you use above the free monthly amounts. You can check your usage of free services in the Azure portal.
You wont be charged unless you switch to "Pay-As-You-Go".
We don't charge your credit card or debit card anything when you sign up for Azure, but you may see a one-dollar verification hold on your credit card or debit card account. The hold is temporary and will be removed, never charged to you.
You might see a "temporary 1$ hold". But you won't be charged.
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Regards
Andreas Baumgarten