What upload speed should I expect to be available to my users? This is for image attachments to emails.

A test we did over the phone for one user came out to about 100 kilobits per second.

The reason I ask is I am not sure if my unloader is creating an unusual amount of latency (edit: I mean time wasted between actual upload of a chunk). It uploads in parts using separate `HttpPost` requests and it base64 encodes the parts and sends them as POST parameters instead of using a "multipart file upload" like a browser would do.

This is the only test I have done with an end user and I don't actually own an Android phone.