iPhone 7 update fixes your Verizon connection problems
If you recently snagged an iPhone 7 or 7 Plus and depend on Verizon for service, you’ll want to check for a software update. Apple has released an iOS 10.0.3 upgrade that that fixes a weeks-long problem where some iPhone 7 and 7 Plus users (particularly Verizon customers) would temporarily lose their cellular connections. If you were affected, your LTE connection would unexpectedly drop out and revert you to pokey 3G speeds. There are no other real improvements, but this could make a big difference if your initial iPhone 7 experience has been defined by flaky access.
Source: Apple
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