Samsung Galaxy SM-A520F/DS

[SeedMella]

Please I need help upgrading to Android 8.0.0 from 7.0.0. I downloaded the 8.0.0 firmware for my region and installed using Odin3. But after the upgrade my radio won't come up. It shows no signal for just one sim alone, but the phone is Dual Sim. When I downgrade back to 7.0.0 both sim signals comes up normal. Any ideas please.