An Intra-network SMS, referring to a text SMS sent within Hong Kong to 1O1O, csl and SUN Mobile customers,destinated service plan customer entitle to a monthly quota of 500 SMS units, the Thereafter Charge is $0.3 per SMS. An Inter-network SMS, a text SMS sent within Hong Kong to users of other Hong Kong networks, is charged at $0.6 each. An International SMS, a text SMS sent within Hong Kong to users of overseas networks, is charged at $2 each. Text SMSes sent from overseas networks to 1O1O, csl and SUN Mobile customers are charged at $3.6 each. Text SMSes sent from overseas networks to users of other Hong Kong networks are charged at $4 each. Each SMS holds 160 English or 70 non-English characters, including spaces and punctuation marks. If the SMS contains both English and non-English characters, a limit of 70 characters shall apply. If your message exceeds this limit, it will be transmitted in the form of multiple SMSes with a charge for each individual SMS sent.