With so many smart phone choices why choose this one? More importantly, DON''T get locked into a two year contract and over-pay hundreds of dollars. BUY THE PHONE YOU LIKE, then choose the service that fits your needs, Better yet, for $20 take your ''old'' number and port it to Google Voice, then forward that number to your ''new'' smart phone... so features like text messages of your voicemails become active. But mainly, buy a great phone like the GT-i9192 from Samsung... because:First, size. This phone can fit in my shirt pocket... an absolute must. I don''t want a phone bigger than my hand. If you are considering a new phone - size should be your first factor to determine.Second, Android operating system versus Apple. A personal choice for anyone, but there is more ''free'' stuff for Android.Third, DUAL SIM SLOTS. Why would you want this? Because this phone can be TWO PHONES IN ONE. So, if you''re a businessman or doctor, and don''t want to carry two phones (one for work and one for personal) this is PERFECT. If you use the same service provider for both SIMs you can keep both active at the same time and switch between them.If you are trying a new service for the first time, like me, and are unsure of reception, and are hesitant to instantly ''switch'' without trying the ''new service'' first, then this phone is great!  I tested the ''Simple Mobile'' service for a month, then dropped ATnT after giving them thousands dollars over the years, and put the ''old'' SIM card in with my new one so I had all my contacts and info instantly on my Samsung. What a great feeling!This phone is for the AMERICAS, NOT EUROPE, NOT AFRICA (like some people are saying they heard from ''Samsung'' service folks).  It states this very clearly on the outside of the box.This phone is 3G only... NOT 4G.  This is OK for me because I am not going to watch streaming video on this small screen, nor do I send (or receive) large files.  This means you have greater service range because 3G is nearly everywhere, versus 4G (even though 4G service will drop to 3G if 4G is not found... I know).  In the USA, this phone works fantastic with t-mobile and it''s derivatives metro pcs and simple mobile (which I use and like).Icing on the cake: purchase a pair of bluetooth (wireless) headphones (like the Sol Republic / Motorola pair) and enjoy music without wires... and when a phone call comes, it mutes the music, announces the call, and when the call ends, the music starts up where it stopped. How absolutely wonderful!