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We are currently exploring options to integrate contactless payments for our project with Telefónica Ecuador. Specifically, we need info on the SDKs available for iOS and Android, as we're aiming to embed POS solutions into our mobile apps. Any technical documentation or examples would be appreciated. Additionally, we're keen on discovering newer alternatives to traditional POS devices. We're particularly interested in server or API solutions that facilitate contactless payments with lighter integrations, as well as web-based platforms allowing payment functionality without physical hardware. Insights on advanced POS options with enhanced features would also be valuable.