Iphone won't receive MMS from other phones?

I have an iPhone SE, and when ever people send me pictures or MMS messages, they don't come through. I also can't sen them, even to apple users.

Doesn't anyone know how to fix this?

ITunes won't let me check/uncheck songs?

I used to be able to check songs I want on my iPhone but now iTunes is not giving me that option. The current version of Itunes doesn't do that. When I plug in my device, it only allows to sync all songs or check artists, genres, or albums, but the option to check individual songs in the summary page is unclickable (not available).

Apple iCloud account got hacked or corrupted, what should I do?

I have subscribed for 1TB space on Apple iCloud in INR 650/month and using only 500GB of space. Now my iCloud Drive hacked or got corrupted and its showing more then 1.65TB space consumed. Neither my devices nor my internet speed is capable of uploading such amount of data in few minutes.

Now I'm worried of my data because I don't have any backup. I trusted the Apple iCloud for all data backup considering **my high price - low memory** Apple devices iPhone 64GB and MacBook Pro 256GB

iCloud don't even allowing me to take backup on external drives and its hampering my work and continuously showing popup to upgrade. I tried calling Apple Care but they are not giving any proper response.

Instagram notifications isn't working properly - iOS.10?

Okay, here we go, so I'm new to iPhone and one thing I really enjoyed in particular when I first started using the phone was how Instagram notified me of people's posts. When I initially got the phone I would get each individual notification with a preview of the photo, even on the lock screen, and what I liked was that with the new 3D Touch I could hold down the notification and I could view the picture blown up, and from there I had the choice to like, comment, or view in the Instagram app, and doing so wouldn't clear the rest of the individual notifications. As time went on (I've had the phone for maybe about two months now) the photo preview for each notification went away and I only had the option to like, comment, or open in the app, and this didn't clear my notifications for Instagram, I just wasn't able to view the photo in the notifications bar. Now, even later, when I get an Instagram notification, whether I use 3D Touch to do the three options from my notifications bar, or I choose to open in app, all my notifications from Instagram disappear entirely, which is what Android does and I hate it. Opening one notification, through 3D Touch or just the tap to open in-app, clears all the notifications. It's actually really frustrating and I like how smooth iPhone works compared to Android. How can I fix this if there's even a way? I tried deleting the app and reisatalling, but to no luck. I don't see a cache clear either. Any help… Helps!

Speaker that attaches to the back of an iPhone 6?

What's a speaker that I can attach to the back of an iPhone 6 to make the music come out louder? I saw someone do it in t a video but I didn't know what it was called?

Added (1). It is like a speaker that attaches to the back that isn't that loud. The speaker is flat and just clips n the back.

Iphone 5c battery life VS iPhone 7?

If I upgrade to a 7 plus or even just a 7, will I notice it lasts longer than my 5c? I use my phone a LOT, and my 5c needs to be recharged before the end of the day.

My iPhone 6 glitches so much and I don't know why?

I have an iPhone 6 and it glitches with everything I do. Texts take forever to type and I can't even play games on my phone because it glitches. Does anyone else have this or had this problem and if so how did you fix it?