Mobile data

Try restart your phone if isn't working. This may help clear away system issue if problems occurr. If not, Even go to Settings > Connections > Mobile Networks or SIM Card Manager, Check your sim card settings such as when you use mobile data as your personal such as (e.g. SMART) rather than other carrier. Otherwise, Contact the Customer support.

I already did, I even reset my phone hahahhaha

where exactly is customer support?😅

When the 'Sign in to network' notification appears, it usually means that your postpaid plan does not have any data allocation left, or your account is overdue. If prepaid, it usually means you are not registered to a data package.

If you are on Smart Postpaid, it means you should pay your bill. If you are on Smart Prepaid, you need to register to a promo.

'Sign in to network' also appears to all my samsung phones if I dont have data allocation or load in connecting to internet. Just try reloading if you are prepaid user or contact your network provider if you are postpaid user. It is not a fault of your phone :)