IPhone 5 battery percentage won't show?

It's on in settings, and no matter how many times I turn it off or on, it just won't show. This randomly happens, but usually it comes back after I turn it off and back on. In settings. Nothing seems to be working.

Best way to hook up my car audio?

I bought 4 speakers (2 front, and 2 back), they are Polk Audio DB651S
Technical Information:
Driver Complement
Tweeter
Quantity 1
Diameter 3/4" (1.91cm)
Type Silk/polymer composite dome
Mid / Woofer
Quantity 1
Diameter 6 1/2" (16.51cm)
Type Dynamic Balance driver with polymer/mica composite cone with rubber surround
Electrical
Total Frequency Response 50Hz-22kHz
Nominal Impedance 4 ohms
Efficiency 92 dB
Power Handling
Continuous 55 watts
Peak 165 watts
Installation
Cut-Out
Diameter 5" (12.70cm)
Full-Range Mounting Depth
Top Mount 2" (5.08cm)
Bottom Mount 2 1/4" (5.71cm)
Grille
Height 15/16" (2.38cm)

I also Bought a 10 inch Polk DXi104 SUB,

Next I bought a Kenwood Deck DDX-790

DVD/CD receiver with AM/FM tuner
built-in internal amp (22 watts RMS/50 peak x 4 channels)
6.95" motorized touchscreen with variable color button illumination
Bluetooth adapter included for hands-free calling and audio streaming
Pandora control with iPhone, Android, and Blackberry
App Mode allows iPhone 4/4S use for select streaming audio and video apps
display function for Garmin "Streetpilot" navigation app for iPhone 4/4S - cable required
fits double-DIN dash openings
Audio/video features:
plays CDs, DVDs, and USB memory devices (see Details for full capabilities)
EQ Pro 3-band parametric equalizer with 8 preset EQ curves
high- and low-pass filters
subwoofer controls
speaker type setting
Expandability:
iPod control: Kenwood cable required for full access to audio/video content
works with SiriusXM tuner (not included)
inputs: dual rear A/V inputs, rear USB input, rear-view camera input
outputs: A/V output, 6-channel preamp outputs (4-volt front, rear, subwoofer)

Now i'm assuming i need an AMP to power all of this, and thats my question. What kind of amp do i need.

I bought a JX360/2 JL AUDIO 2-CHANNEL 720 WATTS AMP is that enough?

MY plan was power the sub with the amp and the speakers with the deck. I just want to make sure that
I will get the best sound that way. Thanks.

Added (1). I have a 2011 HYUNDAI ELANTRA SEDAN

Top Portable Trading Devices?

I just want to ask your opinion on something.

In the future, I'm looking to buy a portable device aside from a laptop such as an iPhone or Galaxy Note so that I can monitor the markets when I'm not at home.

When I say markets, I mean the currency markets (Forex).

It has to have both wi-fi and 3g/4g (I don't know the difference) capabilities.

Please post your opinions of different devices with their pros and cons.

How to sync files from PC with iPhone without iTunes?

How can I sync files with windows PC, Copy paste music or use iphone in mass storage mode just like other phones? Is there any way? Apps? Can all this be done without iTunes? I don't like iTunes and find it difficult to sync music using iTunes… Pl help friends

Bluetooth file transfer in iPhone?

How to transfer files from iPhone to Non-iPhone using Bluetooth and without jail-breaking the iPhone? Are there any apps to do so? Why is Apple not allowing this basic feature?

Why does it cost to make an iphone app?

I just don't understand why it would cost you to make an app? I do understand the 100 dollar fee apple charges you to publish it to itunes, but i don't understand why it would cost thousands of dollars if your creating the coding off by scratch? If you are creating the codes why does that cost thousands of dollars? It should be free since you are manually typing in the codes? It might be a dumb question but i really just do not understand it?

Why is my iphone bill so high? How do i fix this

I have had an iphone for 3 years now but last January I got the iphone 5.It wasn't until March when my phone bill peaked up to around $500 when it is usually around 70.

I think its my data usage that's so unbelievable high making my phone bill so expensive, but I don't know how to stop it. I called Apple and the guy even said the amount of data used is humanly impossible to do.

So is this a glitch in the phone? I've done nothing different with my phone for the past 3 years and since march my bill has been crazy high and iv had to pay most of it.

Also, turning off the cellular data button was suggested for me to do although i didn't even know that button existed and have never turned it off and neither do my friends so why all of a sudden is this happening?

Added (1). Also all i use my phone for aside from texting is twitter sometimes facebook, instagram, youtube and the odd google search. The Apple guy also said it is as if I stream videos literally 24/7 on my phone which is obviously not true