Ive recently upgraded my old ZTE dongle (7.2mbps) to the new huawei e353 21mbps. What I found is that my internet speed has decreased.
Let me explain, the new dongle does add some extra speed, like when the download has 80% completion then the speed picks up goes upto 500kb/s. Now the main problem is this huawei dongle when in standby (and by stand by I mean there is no active download) swithes to some slow speed mode (the light changes to blue) (several programs Ive tried says it 3G/UMTS, in contrast when downloading it says HSPA+, HSUPA etc).
The problem is that it takes several seconds to swith from slow speed to fast speed mode, now this basicly affects web browsing, it takes several seconds(5 to 15) to load a average webpage mainly because it takes long time to load the pictures.
Now this problem did not occur with ZTE dongle, it was always in HSPA mode and the pages were loading instantly, when downloading big files the speed would pick up intantly aswell (it was ussualy 400kb/s).
Now tell me, maybe I am doing something wrong, maybe there is an option somewhere or a patch/fix to keep this dongle in constant HSPA mode, because I just dont feel like having a 21mbps dongle and browsing at 25kb/s. Otherwise I'll sell it on ebay.
some more info:
tried same pages, same downloads (files) with both ZTE and Huawei, ZTE is faster
I ve tried both dongles from the same location (my house, Huaweis reception is actually better: -83 dBm vs ZTE -91 dBm)