Simplified timeline of events, which I wrote about:
- 1991 - Centertel launch
- 1996 - Plus and Era launch
- 1998 - Centertel launch Idea as prepaid brand
- 2001 - the original Centertel network stopped accepting new customers
- 2004 - Era launch Heyah as prepaid brand
- 2005 - Idea rebranded to Orange
- 2007 - Play launch
- 2011 - Era rebranded to T-Mobile
- 2013 - the original Centertel network closure