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Validates Turkish mobile phone numbers in both domestic and international formats. The pattern matches numbers starting with 5xx (Turkey's mobile prefix) with 3+3+2+2 digit grouping, optionally preceded by +90, 0090, or a leading 0 country/trunk code. Accepts spaces, dashes, or pipes as optional separators, e.g. 5321234567, 0 532 123 45 67, +90-532-123-45-67. Typically used in contact forms and user registration validation for Turkish users.