T999L unlocked (metropcs) stuck in EDGE topic

ok i have a galaxy s3 t999l activated in metropcs

repair after my imei ... my s3 stuck in EDGE and the internet slow ..

and call metropcs apn and this well and still the same ..

and I think my imei is fine

samsung galaxy s3
model number: t999L
verion: 4.3
baseban version: t999luvubmk4

mobile network type: EDGE

I can post here my imei?