Error Correction

If you make an error or want to go back and add a word or letters you can move the cursor to make a correction.
Hold your finger down and hold anywhere in the text to bring up the magnifying glass.
Whilst still holding down, drag the magnifying glass and cursor anywhere in the text. When the cursor is exactly where you want it release you finger.
You can now add or delete text from where the cursor is.

Reset The Custom Dictionary

If you feel you’ve really made a mess of your custom dictionary, and the iPhone keeps suggesting ridiculous alternate words, you can reset the custom dictionary by going to Settings --> General --> Reset and tap Reset Keyboard Dictionary.

The iPhone Dictionary

The iPhone has a dictionary built in. As you type, it compares what you’ve typed against the words in that dictionary. If it finds a partial match, it displays a suggestion just beneath what you have typed.
If you accept the suggestion by tapping the Space or full stop, great.
If you allow the ‘mistake’ to stand, the second time you type the same word and reject the correction, iPhone adds the new word to its custom, dynamic dictionary. From now on, it will accept the new word and will even suggest it the next time you type something like it.

Turn Auto-Correction On / Off

To turn all auto-correction features on or off to go Settings --> General --> Keyboard and turn Auto-Correction on or off.

Move Dock Icons

Just press and hold any icons on the screen, then drag them while they are shaking. You can put any 4 icons on your dock (grey bar at the bottom of your iPhone).

Dismiss Keyboard Suggested Word

To dismiss the keyboard suggested spelling of a word, you can tap on anywhere of the screen. You do not have to try and press “x” button at the end of the word.

Avoiding the Extremes

 If you want to enhance your iPhone battery lifespan remember to avoid temperature extremes. Avoid using your iPhone at temperatures higher than 95° F (or 35° C) and in very cold environments. Using the iPhone in very hot conditions can inflict permanent battery damage whereas cold temp usage causes temporary battery performance degradation.