Tethering/data question, Help needed

[Padron26]

ive been having a problem with Wireless tether,and data after a few min...between 5-15 mi, my data connection goes out.

if im streaming with sirius ill notice the music will stop and ill look at the screen and itll say data connection lost. but i have a full signal.
it will ussually start back up on its own. with a min or 2

with wireless tether ill be on youtube for instance and it will just stop downloading/uploading for a few minutes, sometimes more.
the 3g signal goes out but not to often. also seems like the tether stops more often if the download lasts longer.

ive done a hard reset, and only running these 2 apps to see if something else it causing it. but it still does the same. any help will be extremely appreciated