Read more details on the embassy website.
https://ec.usembassy.gov/visas/nonimmigrant-visas/
We are pleased to announce the reactivation of the interview waiver process for B1/B2 visa renewals on April 4, 2022. B1/B2 visa applicants who meet certain criteria may be eligible to renew their visa without an interview with a consular officer. An applicant’s eligibility for interview waiver renewal will be determined during the electronic visa application process. In general, to be eligible for interview waiver processing:
You must be renewing a B1/B2 visa issued in Ecuador that is either still current or expired within the past 48 months, and;
You are an Ecuadorian citizen or permanent resident of Ecuador and are physically present in Ecuador, and;
You were fingerprinted (10 prints) when your last B1/B2 visa was issued, and;
Your previous B1/B2 visa was not lost, stolen, or revoked, and;
Your most recent B1/B2 visa application was not refused, and;
Other eligibility requirements may apply.