Default [Q] Metropcs Galaxy Mega

Hello guys I have the Samsung Galaxy Mega from Metro flashed with CM11 and it very unstable. I have the cm-11-20140519-UNOFFICIAL-meliusltexx and my phone seems to not get calls and when I dial it takes around 20secs to get a tone. Also I get really low signal. I live in Vegas and normally 4g is good around here. Is this normal for the phone or is it just Metro? Also the phone doesn't even say Metropcs anymore it says T-Mobile. Thank you for any help or suggestions ~J Paez