Because this question is pretty ambiguous, here's some basic troubleshooting info:
Blame your service provider and see if your cellular connection is adequate.
Quit some other apps you are running and turn your phone off and on.
You have VoiceOver on and can disable it in Settings>Accessibility>VoiceOver.
You can't apple banned getting flashplayers but you can if you jailbreak it by getting a iOS 6 is out so if you have iTunes you can do that hid update and it will say blablabls iOS 6 but I think you should get a older iOS but iOS 6 gives you messages and newspaper and more I think you should get iOS 5.1.1.
If it's bricked it has to be restored by Apple to factory settings.
iOS 6 is free.
Yes, when iOS 6 comes out it will be free of charge, just like iOS 5 and iOS 4 were.
You can fix up loading Icom problem in IOS 7.1 by resseting your phone to an earlier state.
Some ios 6 devices can be jailbroken.
Probably not. The only OS for iPhone currently in beta is iOS 6. There are is no iOS 5.1.2 currently in beta and iOS 6 should be out within a few weeks. Unless a security hole in the current iPhone OS is found before 6 is released, don't expect an update to iOS 5.
Yes you can.
Yes. This can be done between an iOS device running iOS 6 or greater, and a Mac running OS X 10.8 or higher. For the record, the 10.8 update renamed iChat to Messages (silly right?). You can do this by assigning your Mac an email to use for Messages or connecting your Mac with your phone number to receive all iMessages your iPhone gets. You then message that email or phone number for it to appear on the Mac.
No. It is just to soon for the devs to get an untethered jailbreak for iOS 6. Plus iOS 6 isn't available to the public just yet.
Yes. All iPad minis should be running iOS 6 and can update to iOS 7 this fall.
At the moment iphone 6 runs ios 8.1.3