Hi , i recently submitted a proposal and got the response from the client. the client send watsapp number to schedule an interview whereas Upwork also has a schedule a call feature. Is it permitted( i doubt it as Upwork does not allow such behaviour). I have asked the client to set a deal / terms conditions on Upwork. Waiting for response yet.
I checked the job post you were referring to and it appears that it's already been taken down because it was in violation of Upwork TOS.
Please check out this course for more tips on staying safe on Upwork and please use the flag option found on each job post or message anytime you’d like to report a violation.