As Wikipedia notes, eSIMs allow remote carrier switching without physical SIMs , making them perfect for students abroad who need local data plans via eSIM coupons. However, unlike temporary travel eSIMs, permanent Philippine SIMs like TNT require mandatory government registration under the SIM Registration Act to avoid deactivation . So while you save with coupons for data, please complete your TNT sim registration at the official portal to keep your primary number active for banking and family calls back home.