Intan Mawaddah; Frengki Putra Ramansyah; Pelli Widiya Astuti Siregar; Winda Mei Lista; Daviyana Maharani; Maharani. ANALYSIS OF INVESTMENT OPPORTUNITIES AND CHALLENGES IN THE TELECOMMUNICATIONS SECTOR IN INDONESIA FROM AN INVESTMENT AND PORTFOLIO MANAGEMENT PERSPECTIVE. GERAM JOURNAL 2026, 3, 178-189.