Telecommunications regulation in the European Union is a good example of how consumers have benefited from EU regional integration. Mandatory EU rules, for example on interconnection, roaming and consumer protection, sit with diverse EU Member State approaches for ex ante telecoms regulation and spectrum auctions and ex post competition law enforcement. What can ASEAN learn from EU regional integration through sectoral regulation? This chapter will consider the dual role in integrating EU markets of (a) the EU Common Regulatory Framework (CRF) for electronic communications and (b) the “workhorse” model of economic regulation in the telecoms sector. The reform of UK telecoms regulator Oftel in 2003 as converged regulator Ofcom across communications markets is presented as an institutional case study for the influence of EU regional integration on a strong national regulatory culture. Conclusions will be drawn about competition policy for the telecoms sector in ASEAN markets, in light of the market integration imperatives of the ASEAN Economic Community – while taking into account the differences in local market conditions for each ASEAN Member State.