IPhone 5 has been acting strange, could it have been hacked?

Okay so I have an IPhone 5 and it goes through stages where the battery acts funky. It will say I have 90% battery and the go down to 40% and just chill there for awhile. Or sometimes it will be at like 45% battery (or less sometimes) and just shut off out of no where and won't turn back on because it's "dead". Then I will put it on the charger and it will start back up again with like 50% battery all of the sudden. I have not updated to IOS 7 yet. Still have the old one going so maybe that has something do with it?
Also, I sent my mom a text message and it sent to her wrong. It was a kind of long message, so maybe that's why? Instead of what I actually wrote, at the end it sent "He just needs to keep his mouth shut!" Which isn't even close to what I wrote. I've also got a few texts from weird numbers so I'm kind of nervous. I check my bank and stuff on my phone, don't want it hacked. Thoughts and solutions would be appreciated!

How to completely delete/hide music off Iphone?

I have an iPhone 5 with the ios7 update. I'm wondering how I delete music completely off my phone. I have turned off iTunes match and when I go into "songs" on the music app on my phone I swipe to delete but they don't disappear. If I do not have them downloaded there's a cloud thing next to the song, I just want to hide or delete all the music I don't want on my phone off.

Do I Share My AT&T Data Usage With My Family?

So my mom just sent me a text saying that I wen't over my 3G AT&T cellular data usage. Now, thats IMPOSSIBLE because as soon as I got a message saying I used 90% of my data, I wen't to my phone settings, and disabled cellular data; from that point on, I didn't go on the internet unless I was over Wi-Fi (the iPhone5s wouldn't let me, which is good). I was curious, could my mom have gone on the internet over 3G with our possibly SHARED data plan? Like, just for an example, I use 50% of my data, then she uses 20%, then my Dad uses 25%, then my Mom uses 5%, even after I get a message saying that I'm 90% over the usage, and I disable cellular data? Please tell me, thanks.

Yesterday at school someone stole my iphone 4s

Well when I called my phone it didn't answer, then someone called back and hang up. I called my number again it went straight to voicemail meaning they turned off my phone. I went to icloud.com and went to find my iphone it said it was offline. And all day today I kept calling my phone to see if it was still shut down. Is there any way that verizon can look up its location cause the person called me back and hanged up. Please help me I been depressed and my mother won't buy me another one.

How to get rid of Other on the iPhone?

My audio takes up 494.8 MB with only 68 songs on my 'iTunes', my 'Photos' take up 127.5 MB, my 'Apps' take up 1.01 GB, my 'Documents and Data' take up 210.4, and finally my 'Other' takes up 4.10 GB! (that's alot!). It leaves my phone with only 217 MB left. I have deleted All my photos and someo f my contacts and all of my notes and my cookies and cache off of safari so HOW DO I GET RID OF THE REST. The message saying "Storage almost full" keeps popping up, please i will try ANYTHING. Thanks!

Added (1). so i can't get rid of it at all?

Does this sound like a ripoff to you?

http://www.cellphoneshop.net/huaweivitria-skin.html?CA_6C15C=530001600000047445

I've been looking for a customized skin for my phone forever and my phone isn't a really nice, nice phone like an iphone5 or something so it's hard to find cute things for it but I found this site and when I first found it was on 1/19/14 and it said the deal expired that day. Now I went back to it and it says it expires tomorrow… I know have money to buy one but is that fishy that it now says the sale ends on 1/26/14 or could it just be that they extended the sale for this item because they're eventually not going to sell that item or something?

Added (1). *now not know sorry

BEST CHEAPEST PREPAID SIM CARD / ADAPTER?

I'm traveling to london, here are 4 questions

1-which is the most affordable, cheap low budget pre-paid SIM CARD for iphone5(my case)

Which has the lowest fees fares for me to send a couple of SMS?
I'm planning on using Wi-Fi available either way so getting a big MB data-sim card plan aint what I'm looking for, I'm not staying more than a week, and I will like to get a good price for a prepaid sim card to send SMS and maybe 2 or 3 calls while I'm in UK.

Also

3-Where do I get an adapter convertor so I can plug and charge my iphone 5 in UK?

4- How much do they cost, the cheapest (that works! Don't want to be dead on battery nor get my iphone all screwed.)

I'd appreciate your help! Very much

Why can't my Android receive texts from certain iPhones?

Most of my friends have gotten the iPhone 5, and I have a Droid 4. Someone gave me her number last week and now whether I'm gonna receive a text or not is unpredictable. Like, the first 2 days I texted her I got back her messages, but after that it's all just stopped; she gets mine but I don't get hers anymore. I know she isn't just not texting back because the first time I got no response, the next day when I saw her in person she asked me if I got her text or not.

I have plenty of other friends I always get texts back from who have iPhones. The problem might be on her end, but I barely know a thing about iPhones so I wouldn't know. Also, this might even explain some other similar incidents where I haven't gotten texts back, only from iPhones. I thought it was just a normal thing, like I just wasn't texted back, but now that I know this can happen, I don't want this to turn into a serious problem.

Is it an iPhone to Android issue, or something else?