South Upi comprises 11 barangays with an estimated population of 45,318. 11 of its barangays (100%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Biarong | 131 | 0 | Dead zone: no towers from any source |
| Bongo | 3,290 | 0 | Dead zone: no towers from any source |
| Itaw | 44 | 0 | Dead zone: no towers from any source |
| Kigan | 1,187 | 0 | Dead zone: no towers from any source |
| Kuya | 8,967 | 0 | Dead zone: no towers from any source |
| Lamud | 1,444 | 0 | Dead zone: no towers from any source |
| Looy | 4,482 | 0 | Dead zone: no towers from any source |
| Pandan | 3,133 | 0 | Dead zone: no towers from any source |
| Pilar | 1,410 | 0 | Dead zone: no towers from any source |
| Romangaob (Pob.) | 18,708 | 0 | Dead zone: no towers from any source |
| San Jose | 2,522 | 0 | Dead zone: no towers from any source |