You gotta negotiate with the payer and use remitly app to send $ directly to your telebirr app and you even get some bonus for transferring via telebirr. The sender payes a small transferring fee that is less than what he pays on upwork. The hardest part is negotiating with the payer to send money using a third party app. Make sure to not mention usernames and links from other social medias as they will ban your account for that. Just explain your situation if the client is understanding and try to give him your telebirr details without triggering the upwork fraud detecting system.