You are not a victim, so if you woke up with the iPhone blues this morning try these simple solutions to see if they help.
Slow iPhone?
Sometimes subsequent to installing an important upgrade you may find your iOS device runs slower than it did before the upgrade was installed. Sometimes this is only temporary as the device indexes its contents and builds up a fresh version of its Spotlight search files – you also see this this behavior in OS X subsequent to some, but not all, upgrades. (Apple could make this more predictable by letting users know if an upgrade is likely to trigger such behavior).
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Source: COMPUTER WORLD