Tailfins is correct; avoiding a contract gives you leverage... not much, but some.
Sharon just bought the new Motorola (don't know which one, but it's the latest & greatest), and it's a very impressive phone.
Her phone has dual-band capability - when LTE (4G) isn't available, it reverts to the 3G network which is very robust. So, it has two different antennas in it so she doesn't drop calls or lose service. LTE isn't fully implemented on any of the networks, so there's going to be gaps with a 4G phone as opposed to your old 3G phone.
Whatever phone you get, make sure you have both 3G and 4G capability since every cellular provider is in the middle of a very expensive upgrade.
Don't be fooled by the salesperson that's trying to sell you a strict 4G phone... they'll show you some nifty maps showing you inaccurate coverage areas. Right now you want both 4G and 3G.
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