Yes, all 4G Sims are 5G ready. Kasi yung 5G network natin dito sa Pinas is NSA 5G and not SA 5G.
Meaning yung 5G natin still relies on 4G sa unang connection before it switches to 5G.
Pero, if yung Phone mo is not 5G-ready. Kahit may 5G sa area mo, 4G parin makukuha mo nyan.
Dapat 5G Phone, 5G Area, and 4G/5G Sim. If 3G lang sim mo, upgrade mo na yan.