| Abbreviation | Definition |
|---|---|
| FLL | Fixed-Loss Loop |
| FLM | First line Maintenance |
| FLN | Fixed Line Network |
| FLPC | Forward Link Power Control |
| FMC | Fixed Mobile Convergence |
| FMCG | Flight Management Guidance Computer |
| FMR | Follow Me Roaming |
| FMS | Fixed Mobile Substitution |
| FMT | Fixed Mobile Telephony |
| FNN | Full National Number |
| FOB | Forward On Busy |
| FOCE | Free Online Currency Exchange |
| FOE | Fiber Optic Equipment |
| FOTP | Fiber Optic Test Procedures |
| FOTS | Fiber Optical Transmission System |
| FP | Full Period of service |
| FPLMTS | Future Public Land and Mobile Telecommunication System |
| FPLMTS | Future Public Land Mobile Telecommunication System |
| FPLMTS | Future Public Land Mobile Telecommunication Systems |
| FPLMTS | Future Public Land Mobile Telecommunications System |