My phone occasionally tells me: "Currently unable to continue download, please try again later". What was it trying to download? I have a Samsung Galaxy S3, which I often use as a hotspot for my laptop when WiFi is out of reach. I have a good deal with my carrier so that I have unlimited and fast connection anywhere. Everyone's happy.

Recently, my connection has been beginning to slow down, only sometimes, so I did some testing, and I found that whenever the connection is slow, and I go into Flight Mode (a.k.a. forcibly disconnect the internet connection), I get an anonymous popup message (The smaller ones at the bottom, not the alert() style ones):


  Currently unable to continue download, please try again later.


Now, I didn't initiate any download, so I presume some application is doing it. I've uninstalled everything but the bare essentials, and it still happens.

Is there a way for me to know what my browser is downloading, what kinds of requests it's sending, how much and from where?
I have read in several websites that users with the Samsung Galaxy S3 are getting that exact same message when having MMSes that fail to download (probably old ones...).
If possible, delete all and repeat the steps taken to get the message. If you don't get the message, the problem is solved and in the future we all know from where it is comming.
My original comment on the question:

Further into that issue, other users of your device have reported the same message in relation to the MMSes. Do you have any MMSes on your device?