Consultation, htc m7 no signal 3G . Help

Hello everyone. I have a pretty serious problem with my phone, buy a htc m7 one online, I noticed that the bands supported are those of my country (argentina), to put the sim card cell recognizes perfectly 2G network, I can make calls and surf with edge, but to force the phone to 3g networks not only captures signal. Probe set the APN, but I had no solution. I want to know if there is any solution to the problem, the only thing I did is plug the phone in fastboot to get the data I'm going to leave.

HTC ONE M7 801e
Model: PN07110
FCC ID: NM8PN07110

ANDROID: 4.4.2
HTC SENSE: 6.0
VERSION DE SOFTWARE: 5.11.401.10
NIVEL API 6.20

BANDA BASE: 4T.27.3218.14_10.33C.1718.01L

VERSION BOOTLOADER: 1.57
PRODUCT:m7_ul
platform: HBOOT-8064
modelid: PN071****
CIDNUM: 11111111

Thanks.

Help please.