Should be able to support Singapore 5G. The main island-wide SA 5G networks by M1/Starhub and Singtel, are based on 3.5GHZ (n78) band if i not wrong and if you look at Sony website (non sg website), the phone do support band n78. However the phone does not support mmwave 28ghz 5G though (similar to samsung s21 ultra 5G) but I believe not that critical since mmwave only on small scale, not island-wide although Singtel mentioned they did implement mmwave.
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