Better - Saldo Comviq
The fastest way is to dial *111# on your phone and press call. Your current balance will pop up on your screen immediately.
If your balance is low, you can "tanka" (top up) using several methods: saldo comviq
Purchase a digital code from sites like Tasonic or doctorSIM and dial *110*code# to activate it. The fastest way is to dial *111# on