Samsung S23 Ultra Signal Strength Weak?

Present i m living in very very small village. There is no mobile towers. Airtel sim I m getting signal i m getting my recently purchased Vivo X200 Pro. But Samsung S23 Ultra Signal totally dead. Same Airtel sim. All Samsung mobiles same or only S23 Ultra Signal Strength is weak.

If I upgrade s25 Ultra Same signal Strength. Anyone please tell me

One more: S23 Ultra & S25 Ultra Same 5G bands.