Hello Team, There is several service providers here in Turkey who gives PTT service by their PTT enabled SIM cards. One of our customer needs to use this PTT service with our MC55 devices. Amount is +600pcs and there is much potential too. I just wish to ask if there is any special application or setting needed on terminal side or anything special needed on service provider side. Do you have any experience before with service providers or any recomendation would be helpful for me. Best regards for all