No signal/couldn't connect with SIM. Try again later

[Santilits]

Hi, just restarted my phone due to data being slow even with 5g and couldn't make phone calls. After restart, I have no signal, and no sim detected and everything. When I go to sim manager it just says "Couldn't connect with SIM. Try again later." 

What I did was tried restarting multiple times. Reinserting the sim try and cleaned it. Tried airplane mode on and off, etc. Nothing worked

[RMCJr]

In "Settings", go to "General Management", then "Reset". Then, scroll down and choose "Reset mobile network settings". After that, restart your phone.

[Santilits]

Nothing worked, i just bought iphone instead lol