Complex sentence: In 2000, providers started to offer "inclusive" call packages where calls to 01 and 02 numbers of up to one hour duration are free, and within a few years most customers were on this type of plan.
Split into simpler sentences: In 2000, providers started to offer "inclusive" call packages where calls to 01 and 02 numbers of up to one hour duration are free. Within a few years most customers were on this type of plan.