Can somebody explain to dummy how to download and install to IPhone 5 an official bitcoin client? Do I need any applications to be preinstalled? I tried but havn't succeed.
Apple banned all "local based" bitcoin wallets from their app store.

The only wallet that works good as far as i have tested on iPhone is the online web wallet from
https://blockchain.info/wallet/ web-site. They also have their own iPhone app with integrated web-browser to use the online wallet with.