dissapointed by the m8 no 4G ! ?

i am only getting edge not even Hspa how even though to get 4G ... what could be the problem here ? what is the most common ... i am running custom rom skydragon sense 7 5.0.2

i can see my imei when i go into settings and identity is there

might be my carrier ? Cyprus atm so is gsm here i guess . shall i go to one of there shops and ask or it can be done something esle from here . i seen somevideos some people using some apps from google play to get there 4g ... pfff don't know what to do

any suggestions please .