Hlo Now days I'm facings lag on my m34 can you bring a software update for M series team Thankyou

Today and last week I noticed that some time flash light not work last time it take some second but now it's not working .But when I restart phone it running properly  Expecting that Samsung give a update and fixed it.  

Never buy technical things by Amazon or another site or apps they sell cheap quality product  I buy a Sam m34 after 6 month phone fell around 2 feet and display damaged   The cost of repair is high 

When I call someone 5g gone to 4g mode

My m34 didn't get 6.1 update even lower series take