Default Slow Wireless...

Hi everybody,

Despite having an stock configuration on my xperia ultra I have noticed that the wireless is not as fast as it should be, for example my psvita reaches actually 4 MB + constant whilst the xperia ultra barely reaches 3 MB. This is with both stock and doom kernel, only one time I have seen it reach full performance and that was on the previous android to kit kat, anybody has a similar experience here? Thanks in advance.

P.D. my router is an asus Asus RT-N56U.
P.D. 2 Wireless Optimization and Queue Background data are disabled.


Current:
Rooted Xperia Z2 + PHA-2 + XBA-H3 + SBH-52 = Pure Audio Awesomeness.

Sold:
Xperia Ultra / RAZRi

Alarm Clock:
German G1 - InfinityRom