How to know the GB of iPhone 4 without turning it on?

I have an iPhone 4 for AT&T. I don't have a SIM card and so it doesn't let me go to the home screen. It hasn't been set up yet and it won't let me go through setup without one. I can't seem to find any indications of it in the back anywhere either. Is there a way to find out from the numbers on the back? Or some other way I don't know about?

Trying to sell it but don't know the proper GB to list.

Please and thank you!

Website pictures look blurry on iPhone?

This just started but on my iPhone 4 eBay pictures look pixeled or blurry and when I go in Pinterest it's the same? Please if any knows how to fix it tell me how

No sim? Says searching? What do I do?

Everytime when I turn on my iPhone, it'll say either "searching…" or "no sim" at the top. I've tried resrting my phone, taking out the sim card and puting it back in, turning on made and turning it off. Help me please?! I don't know what to do, and I need to be able to get in touch with people.

Am I the only one who thinks it's okay to?

Tell someone you don't like what they got you for Christmas? But don't get me wrong, there's no need to be rude in telling them so, but maybe asking politely for an exchange in the same store? I got presents for everyone in my family that I could afford (mom, dad, sisters, brother, aunt&uncle, and grandma). If they didn't like something I bought for them, I'd understand and wouldn't be so offended at the thought of exchanging it for something they like better. Like for example, my sister asked for a black men's wallet. I got one on amazon that had the highest ratings but was still manageable in price. I'd be okay if she would prefer another one and expressed that to me. Are we expected to know every single thing a person wants? Of course not. And if they don't like it, big deal. Just as long as they're not a brat about it, it's okay right (like wanting a white iphone instead of black, that is unnecessary)? And I'm only talking about something if it was sort of expensive and from a family member. If it was from a friend, I would never tell them I didn't like it. If it was a handmade gift, I would be thankful that they took the time to do that for me and I wouldn't say anything about that. But if it's an expensive pair of shoes or piece of clothing that you didn't necessarily ask for and it's not going to be used much, what the harm in wanting something you are going to use often? After all, the gift giver wants to make the receiver happy, right?

By the way, I'm a 16 year old girl that comes from a Christian family. I'm thankful for everything my family provides. But growing up, my parents have always and still are struggling with money. They want to make us kids happy and maybe it's different in our family, but if we aren't going to use something often, they like to know so I could maybe exchange it for something else that I will use a lot. Anyone have an opinion on this? I don't mean to come off as ungrateful and I hope someone understands what I'm trying to get at.

Added (1). I know it's not just about me… Obviously.

What does it mean if a stranger takes pictures of you?

So I was at mall today & I was eating at the good court & I noticed this guy was looking at me like A LOT. So I just ignored him & then I glanced at him to see if he was still staring at me & he had his iphone up & pointed directly at me & he was pressing the screen like 5 times then he looked at me & when he saw I was looking at him he smiled & then left. I don't know what he was doing but I hope he isn't a phsycopath. What does that mean?

Iphone stuck on recovery mode loop?

I don't think I've used every method… Obviously because I have yet to see any restoration to it.
Its is an iPhone 4. 16G.
Every time I try to restore it it always stops where iTunes is restoring the firmware… It always stops the moment it tries to restore the firmware…
When I used it on redsn0W it said that "Blobs are corrupted"
I'm stuck guys. Please. Any help will be appreciated.