It's not letting me send my message?

So I recently got my friends number who has a galaxy S3 and I have a iPhone 5S. We texted each other only about 3 messages each and then all of a sudden neither of us can get our messages to go through. We can both text other people, but whenever I try to text her or she tries to text me it says the message can't go through. We've both tried deleting our numbers, making sure we didn't block each other, and my MMS messaging is turned on. It's getting quite frustrating so someone please help!

Delete individual iphone app cache app or a replacement for itube?

My phone is pretty full because of the things I've cached with the itube app. I wish I could simply delete it and reinstall. My only options are to: find an app to delete that app's cache, find an app to replace itube, or give up on listening to a personal playlist away from Wi-Fi and all.

Can I trade my 5s in for a 6? (Tmobile)?

Hi, I just recently got a 5s less than a month ago, so the phone is still basically brand new, however after experiencing the Iphone 6 I've decided that I like the 6 instead. I have a 2-year contract plan with T-mobile, and I was wondering if anyone knows if I'd be able to trade for the 6, also how much would the estimated difference be?

Help spotting a hiding person?

So, I have a stalker that has been blackmailing me, I can't go to the cops (seriously, don't even suggest this) but I know they hang out and hide to wait for us at a certain spot in the woods. I was thinking of getting a thermal app on my iPhone but they are fake. Any suggestions of how to see these people so we can find out what they want?

What's taking my IPhone 6 so long to ship?

I ordered a silver iPhone 6,62g unlocked t mobile on November 15,2014. I didn't get the plus so it should take quicker I assume.
It has been processing since then. When I originally order it (on a Friday), the delivery time was nov 28-dec 3

Yesterday this has changed to dec 3-dec8 without notification… Should I just be patient or ask to make sure my order is OK since it hasn't passed the processing.

Why do my emails automatically get deleted after a certain amount of time?

My emails always get deleted after a certain time on my iphone?! It makes me made because i have colleges emailing me on my phone and sometimes when i need the emails they aren't there anymore. I tried making a folder and putting the college emails in there and they still get deleted! Help how can i stop my emails from being deleted? I have an iphone 5 and my email is with outlook/hotmail.

Where to buy a good quadcopter?

I'm looking to get a quad copter that takes video. I would want one that either has a really good camera built in to it, or one that allows you to attach a iPhone to it and use that for the camera. If anyone know where I can get a really good camera quadcopter.