Just a theory:
Possible hindi cap boss. Kasi ayon sa mga nakasubok from different threads, hindi sya by location kasi may isang user dun na dalawang sim sinubukan nya, pero may speed cap yung unang sim.. so naisip nya na baka dahil sa usage... Heavy kasi yung nagka cap.. however, may another user din na hindi heavy user pero na cap din.. so it could be a sim basis, more likely malas ng sim pag tinamaan ng cap
I'm still looking for more experiments though, it could be ip thing, or sim prefix, or another thing entirely.. baka may flagging mechanism si telco na once detected sim mo..nasa capped list na sya.