Is it possible for anyone to access your texts and WhatsApp messages?

I gave my iPhone 4 to my ex, now I'm wondering if there's anyway for them to access to any of the current messages that I sent out to other people. I know this is a dumb question but I'm
Trying to make sure since whatever you sent is within your own sim card.

Added (1). Yes I haven't deleted any of them. What am I supposed to do, why are they able to accessed to it honestly?

Added (2). I mean whatever I sent now they can receive as well? Not what was alrdy in it phone before I gave it to him

Why is my new iPhone so slow?

I got my first ever smart phone for Christmas last year (2012)-- an iPhone 4. (Don't judge; it was free from Verizon and we're poor!) It only has 8 GB (which is probably part of the problem). But I've only had it for a few months and it's so slow. I've done all I can think of: turned off programs running in the background, updated it so everything is current, deleted all unnecessary things (pictures, apps, texts… ), there's basically nothing on my phone. Last night I even deleted all the music on it in high hopes of clearing it up. All that makes me think that the problem isn't a storage issue. But then I don't know what it is! I'm technologically savvy, so there's probably something I'm missing. The problem doesn't seem to be the 3G, and it's not the wireless (I use my home wi-fi most of the time, and all the other devices-- including my sister's identical phone-- are just fine). This morning I finally gave up and deleted Facebook as well-- it wouldn't run at all. It would just show me a red banner that said "Network Error" and then shut off and go to my home screen. So sad! So… My phone is all but useless now. Does anybody have a clue what's going on? Like I said, I'm technologically savvy, so if you have advice, break it down in easy terms!

IPhone 4S still says 3G even when connected to home Wi-Fi?

So I'm sitting at home, phone is connected to my home Wi-Fi. Internet is loading totally fine but my phone still says 3G instead of the Wi-Fi icon. I'm only pay as you go which doesn't include 3G, so it couldn't possibly be running on 3G cause I have no money in my phone. I disabled 3G on my phone anyway, and the icon changed to a circle, still no Wi-Fi symbol but Internet is still loading fine and at normal speed. What's wrong with my phone?
It also does this even if I connect to other Wi-Fi spots outside of the house.

How to change song names on Itunes and transfer to Iphone but not duplicate them?

I've added songs long ago to my Iphone but now I wish to correct the spelling and such because If i go to artist on my phone it only shows some songs.Id like them to be in order and everything neat and tidy. How do i change the songs names on itunes to proper artists and spelling etc and then transfer that same file back to my phone without duplicating it?

IPhone 5 or wait untilthe iPhone 5s come out?

I heard rumors that the iPhone 5s is probably coming on sale in July or August. The think is that I need a new phone and I wanted an iPhone. So I thought I will get the iPhone 5 but now someone told me that the iPhone 5s is coming soon and it might be cheaper and have a better software. What do you guys think? Should I wait? It worth to wait or not? Should I buy it now? Any ideas? :/

Iphone 3GS, says no service after jailbreak.how to fix this?

I recently installed IOS 6.1.2. I jailbreak it, installed cydia.redsn0w, red sn0w fixer but i it couldn't read get signal. It can read my sim card because it doesn't show no sim card installed and it can read the right carrier in settings. Yet, "No service" and sometimes, "Searching" shows up at the upper left corner.So, how can i fix this?

Is there a reliable app for the iPhone to store photos?

I'm going To upgrade to the IPhone 5 and I really want to keep all of my photos and such. I was wondering if there was an app that I can store all of my photos securely and then when I get the new phone, plug it in to the lap top and all of the data that's on the app transfer over to my new phone? Is there such thing?

How to get Auto-brightness to work on iphone 4?

I've read so many websites and all of them claim to have a fix but this fix isn't working for me.

I have never been able to get it to work, even before the Auto-brightness overhaul in IOS6, it doesn't matter whether the slider is set to on or off the brightness level remains the same.

I've tried calibrating my device

- Go into a dark room
- Turn auto brightness off
- Drag the slider all the way to the dimmest setting (or which ever brightness you're comfortable with)
-Turn Auto-brightness on
- Step into a light area and it should auto adjust

But this doesn't work, I try this and it just stays at the dimmest setting after going into broad sunlight.

So I tried calibrating it for bright too, turned auto off, dragged the slider to 50% / 75% and turned it on, walked into a dark room and it's still bright.

Any suggestions?

Added (1). I notice no change at all, I've seen videos of it in action and the slider does change, depending on how it was calibrated the amount it would change would be very noticeable, I've calibrated it to be very dim in very dark rooms yet I still get blinded in the night when I go to check my phone

What's the difference between the AT&T Mobile Share plans?

Recently I moved to a rural area where I need to get the mobile hot spot feature to get internet service. So I head to best buy and get MiFi and all is well. I have three Iphones on my plan and now add the MiFi feature and think that I'm saving money.

When I get the bill it shows that I'm paying for the following:

Mobile Share 10GB with Unlimited Talk and Text
Mobile Share Plan for Iphone

My question is if I'm paying for Mobile Share 10GB with Unlimited Talk and Text
AND Mobile Share Plan for Iphone?

Seems to me that they are one and the same.Am I getting railroaded by AT&T?

Any help is greatly appreciated

Added (1). Ryu - I appreciate the response and it caused me to go back and look at the bill. It appears your right on the first line but it also has a charge on subsequent lines also. Here is the breakdown:

Wireless # 1 Mobile Share Plan 10GB with unlimited Talk & Text $120
Note: this was where we added the MIfI for us all to use)
Wireless # 1 Mobile Share for IPhone $30.00
Note: This would apply to the note that they are just using details-no added cost)

Wireless # 2 Mobile Share for IPhone $30.00
Note: This does add to overall cost

Wireless # 3 Mobile Share for IPhone $30.00
Note: This does add to overall cost

As you can see I'm clearly getting charged on the two additional lines for a Mobile Share for IPhone. The total cost adds the two other line fees.