Hi all! We a partner that tested this script for importing contacts and send message, and it´s working good so far for him. Script: private static string TreatPhone(string phone) => NeedsDigit(phone) ? EnsureDigit(phone) : RemoveDigit(phone); private static string EnsureDigit(string phone) => phone.Length == 13 ? phone.Insert(5, DIGIT) : phone; private static string RemoveDigit(string phone) => phone.Length == 14 ? phone.Remove(5, 1) : phone; private static bool NeedsDigit(string phone) => string.Compare (phone.Substring(3, 2), LAST_DDD_WITH_REQUIRED_DIGIT) <= 0; private const string DIGIT = "9"; private const string LAST_DDD_WITH_REQUIRED_DIGIT = "29"; private static readonly string[] DDD = new[] { "11", "12", "13", "14", "15", "16", "17", "18", "19", "21", "22", "24", "27", "28", "31", "32", "33", "34", "35", "37", "38", "41", "42", "43", "44", "45", "46", "47", "48", "49", "51", "53", "54", "55", "61", "62", "63", "64", "65", "66", "67", "68", "69", "71", "73", "74", "75", "77", "79", "81", "82", "83", "84", "85", "86", "87", "88", "89", "91", "92", "93", "94", "95", "96", "97", "98", "99" }; Could you implement it for correcting contacts while importing, or when using api call with external token and smschat api calls. I think we will solve many problem with message delivery, because this script is considering Brazil cities phone configuration. Thank you. Clayton Aires