What are the services for providing virtual numbers?

Question

Telephony

The girl is going abroad for several months and asks for help in organizing a telephone number for her to work remotely at the Moscow office.
Those. it is necessary that: clients in Moscow call a Moscow number (495/8800/just a mobile/etc), it was redirected to her number in Thailand and the girl received a call to her local number in Thailand.
And ideally, the same thing should work in the opposite direction: the girl calls from the local Thai number, and the client in Moscow displays an incoming from the Moscow number.
What services provide such a service? And what nuances should be taken into account when connecting?

Answer 1

https://zadarma.com/ru/
I use it to communicate with relatives abroad

Answer 2

By the way, we also tried a lot of virtual PBXs, thanks to free testing, but stopped WestCall (westvirt.ru), functionality, ease of use and low rates helped to make a choice in favor of WestCall.