Brussels, 30/06/2011 (Agence Europe) - With effect from 1 July 2011, and until 30 June 2012, EU mobile operators will again be obliged to lower retail prices for roaming calls in line with EU rules first introduced in 2007 and amended in 2009. Consumers opting for the EU-regulated “Eurotariff” will pay no more than 35 cents per minute for calls made (as opposed to the current 39 cents) and 11 cents per minute for calls received while abroad in the EU (compared to the current 15 cents)....