Complex sentence: For example, calls made within Bangkok begins with 02 followed by 7-digit phone numbers, and calls made from Chiang Mai to Bangkok also begins with 02 followed by 7-digit numbers.
Split into simpler sentences: For example, calls made within Bangkok begins with 02 followed by 7-digit phone numbers. And calls made from Chiang Mai to Bangkok also begins with 02 followed by 7-digit numbers.