To set a warning and a threshold limit to control monthly data usage: - open "Settings" appĀ , - tap on "Network & Internet", - tap on "Data usage", - enable on "Data usage" or "Mobile data", if needed (select a SIM card, if needed),* - tap on "Data warning & limit" - tap on "App data usage cycle" and enter a date corresponding to your billing cycle, - enable "Set data warning", - tap on "Data warning" and enter a value, - enable "Set data limit",** - tap on "Data limit" and enter a value corresponding to your data subscription.