(Telecompaper) The cost of a mobile plan including a top smartphone showed a general decline in most countries in Western Europe in the first quarter of 2015, according to the latest research from Telecompaper. The survey of prices advertised in Q1 2015 in 16 countries showed prices trending lower in most countries compared to six months previously, both for plans including a high-end handset and for SIM-only plans. In total, more than 3,200 plans were on offer in Q1, about 18 percent less than during the previous survey in Q3 2014. The research found that mobile plans are coming with ever-larger bundles. For example, around 36 percent of all SIM-only plans had 1,000+ or unlimited months each month, up from 27 percent in Q3 2014. Data bundles are growing as well, especially in Austria, Denmark, Germany, France and Ireland, where there was a strong increase in plans with more than 2GB of monthly data. Across all 16 countries, 34 percent of the SIM-only plans had more than 2GB. The share of plans with less than 1GB of data per month is decreasing gradually, reaching 38 percent of SIM-only plans in the latest period.