each time Samsung do not put bugs but peoples bring that by mistake..that they simply download software through mobile data or fluctuating wifi which is not the procedure to install software......allaways try to flash that firmware thatswhy Samsung gave smartswitch app already....it's because software update or security patch allaways requires stable carrier. in that sense mobile data or fluctuating wifi is not stable..so it can give an incomplete update by damaging software side..then also you will be able to download it but you will welcome so many software holes and glitches which leads to poor battery backup, ui lag,app crush, game lag ,device heat,ghost touch like issues further...so allways try to flash firmware through smart switch or by Odin or through authorised Samsung service center.i allaways maintain that rules hence I can play pubg in my old note 3 also without any lag or issue......ask any software engineer they will recommend you that procedure only because it's the actual procedure....strong wifi also recommended but in india it's impossible that wifi will not fluctuate
Please be assured and to resolve this issue kindly follow the given below steps:
1) Clear the Cache of your device (Settings >Device care >Storage > Clean now).
2) Reset the device: settings >General Management > Tap on Reset. Note: Before reset make sure to have back up of the data via Smart Switch Mobile App (Install Smart Switch App > Open > Click on Memory Card Icon >Back Up option > Choose the data for Back up > Back Up).
If the issue still persist, kindly register your concern in Samsung Members app (Samsung Members app > Get help > Feedback > Error report/ask question). Note: Please send device log files within 15 minutes of issue occurrence along with the exact issue details.
