Complex sentence: Once installed, SDA could be used to support any radio-based telecommunication system in any band, with the same level of performance, e.g., GSM, then UMTS after migration to followed by LTE in band.
Split into simpler sentences: Once installed, SDA could be used to support any radio-based telecommunication system in any band, with the same level of performance. I.e. GSM, then UMTS after migration to followed by LTE in band.