NEW YORK (AP) — High-end smartphones from Samsung and HTC have gotten much of the attention at this week's wireless show in Barcelona, Spain, but cheaper options are coming from Microsoft, Lenovo and others too. Samsung Electronics Co. announced the Galaxy S6 phones, with an improved camera and a more stylish design that ditches plastic for metal and glass. Wireless carriers will likely offer steep discounts with two-year service contracts. Lenovo Group's $349 Vibe Shot includes several camera technologies found in higher-priced phones, including a 16-megapixel rear camera and an optical image stabilizer to compensate for shake in low-light conditions. Facebook CEO Mark Zuckerberg said Internet.org, Facebook's effort to create new users in countries with little or low Internet use, has now released apps in six countries — Ghana, Kenya, Tanzania, Zambia, Colombia and India — offering health, employment and other information services without incurring data charges. Apps are customized for each country, and Internet.org is working with individual wireless operators to lure new users without hurting the local telecoms' businesses. Sundar Pichai, a vice president at Google, disclosed plans to start testing solar-powered drone aircraft as "floating cell towers" that could bring coverage to remote areas or even disaster zones. Google previously announced Project Loon to use high-altitude air balloons to provide coverage for rural areas. In the U.S., Pichai said Google will develop its own cellular service as "a project" to improve ways for hardware, software and connectivity to work together.