IPhone 4 3G service stopped working?

I came back yesterday from camping for 2 days without any service and my Internet doesn't work unless I have Wi-Fi connection.

Like nothing loads on 3G even though I have full bars. Before I went camping, this never happened and my 3G Service worked fine anywhere I went. But after I left camp, it just stopped working. I had this phone for about 1.5 years now.

What's the problem? My Internet usually loads outside of my house but not anymore unless I have Wi-Fi. Is my iPhone just not used to the environment or something!

Can you activate an iphone to any carrier?

Say I bought a used iPhone for Verizon, at&t, t-mobile, etc. And I have sprint, can I activate the iPhone to sprint even though it was made for another carrier? If so, how?

Is that possible to downgrade from ios 6.1.3?

I have iphone 4 ios 6.1.3 jailbroken with tethered sn0wbreeze jailbreak. Is that possible in any way downgrade it to any version? I want untethered jailbroken iphone in any version is that possible?
I do not have any SHSH files. But the phone is jailbroken.
And is that possible to decrypt an 6.1.2 ipsw and upload the whole stuff to my iphone and replace the old thing? It may sound stupid but i'm looking for any way to downgrade my iphone…

Is anyone else not totally satisfied with the Lifeproof case?

I'm sorry but I think the life proof case is like taking $80 and throwing it in the toilet. I couldn't charge my phone, I couldn't use normal headphones and I felt like I was striking my iPhone every time I touched the screen. And yes I had it on properly and performed all the tests before hand. Does anyone else feel like they wasted their money?

Boys, why ask for a girl's number if your not gonna text her?

So I work with this kid and I've known him for like 3 months and he's called me his girl before and we've had conversations and hes joked with me and what not. I leave for college soon and I told him it was my last week this week, so 2 days ago I'm working with him and at the end of the night I ask him if hes working the next day and he says yeah and I say so am I so I'm about to leave and then he says wait and then hands me his iphone and he wants me to put in my contact info. I know this guy talks to a lot of girls but my question is, is why would he ask for my number then not text me? It's strange too that he waited this long to get my number. Any thoughts?

Wireless devices have terrible download but wired computer is fine?

Both of my wireless devices (laptop and iPod) connected to the router at my house have terrible download speeds around.2 Mbps, basically no internet access at that rate. However, the one computer we have connected using a wired connection to the router has fine internet. His computer says he's apparently getting 100Mbps. Regardless of how fast it really is (I don't think it's that fast) youtube videos load almost instantly for him, webpages instantly, game updates download at normal speeds, the whole deal.

This problem began this morning, and was originally working fine all week. My laptop and iPod work completely fine at my other house, but at that house I have Verizon compared to Comcast here. The only thing I could imagine is this. At the moment we have people staying over and we have a total of 8 wireless devices connected to the router (6 iPods/iPhones and 2 laptops) so is that somehow slowing us all down because of all the noise (not sure what the proper term would be) the router receives from the many devices. I don't think this is the problem since I was getting fine internet two days ago, but there were 6 devices connected to the router compared to 8.

So I guess my question about the whole deal is, are there any reasons (I'm sure there's more than one possible problem with these circumstances) you could lead me to further investigating on my own where many wireless devices have almost no internet connectivity while the one wired device is working completely fine.

One more side thing that I really don't think is the problem, my dad gave away our internet password to our neighbors because they wanted to use our internet while they were at the pool because our house is close enough to connect to. I didn't add any possible devices (if they happened to give it to even more people) to my list of 6-8 devices using wireless connection because the pool is only open before 9 PM and I never get on until after 11 PM. However, if they did happen to give it to other people to use at the pool, I'm worried one person who knows how to hack is trolling us since he has easy access into our network. I don't think this is the problem since I used wireshark periodically throughout the day to see what traffic was going through our router and no unwanted IP addresses are using our internet at this time or earlier today when people were at the pool anyway. So I don't think that is the problem anyway, even if this is a thing to do (prohibit only internet connections to a router), but just wanted to throw that out there.

Thanks in advance for any help to solving the issue! Also nobody is doing any big downloads at the house (no torrents or servers running or anything) the only thing the wired computer is doing is playing dota (a computer game if you don't know) basically all day, so he's not exactly hogging the internet connection and no other devices can even get a fast enough connection to do anything, so they're not using the internet much at all. Anyway, thanks!

Is it possible to make a solar powered iPhone charger?

I wish to make one because I believe it would be useful for camping and such I have a bit if money I can spend but please make suggestions I have a iPhone 5. Could I just use a charging cable sauntered to a solar panel? I have a bit of experience in electronic and mostly wanted to know what the volts/amps must be but now I'm interested in other opinion's. Thanks a tonne! And if at all possible could you list exactly what I would need?

Where/how to put apk additional data of games iOS?

So i got a new iphone 5, but its 6.1.4 so can't jailbreak, n most importantly, I DON't HAVE INTERNET IN IT. So i use itunes from pc to transfer games BUT i can't download additional data in-iphone games.
like Fast n Furious 6, it needs network, then Nitro, Despicable me minion rush,(these r the games i need network so far), n i have very less idea on iOS devices cuz i used android last 3 years…
o i need infos like where can i get the additional datas, or do i need to jailbreak n stuff.
NOTE: the apps on my iphone is all legally paid on itunes(basically free app though. )
so if there's any way OTHER THEN usinng net on mobile, id like to check it out.
n please don't answer like "get a Wi-Fi its cheap" or "search around your home for free Wi-Fi", etc…