Benefits of Per Second Billing Talk for a second. Pay for a second. Pay for only the time you talk. Per Second Billing offers customers more choice. Those who make shorter calls can now spend less. Per Second Billing is applicable from the FIRST second of a call! Advantage of savings on short calls to Other Networks and International. Conversion to Per Second Billing is effected via FREE sms request to 123! Subscribers may change billing plans once every 30 days.