I am in the Chicago area and switched from a Maxx with VZW to the S3 with ATT. The maxx would lose 4g and go to slow 3g or worse, voice only in many areas(yes I did go through many warranty replacements). With the s3, this phone hasnt dropped 1 call or dropped out of 4g anywhere, only LTE has been lost in some places. Does this mean this phone reception is better than the maxx or is it that ATT is better than Verizon?