https://us.community.samsung.com/t5/Galaxy-S21/S21-ultra-Signal-loss-problem-after-uploading-to-one-ui-7/m-p/3232429#M95087 Reset mobile network settings. Settings, general management, reset.<BR /><BR />Also clear device cache:<BR /><BR />1) Turn off your device.<BR /><BR />2) Press and hold the Volume Up button and the Side/Power button until you feel a vibration and the Samsung logo appears. Let go of the buttons.<BR /><BR />3) You will now be in Android recovery. Use the Volume buttons to highlight "Wipe cache partition."<BR /><BR />4) Press the Side/Power button to execute.<BR /><BR />5) Use the Volume buttons to highlight "Yes."<BR /><BR />6) Press the Side/Power button to execute.<BR /><BR />7) "Reboot system now" will already be highlighted. Press the Side/Power button to execute. Mon, 12 May 2025 13:38:49 GMT Mujibar 2025-05-12T13:38:49Z