https://support.google.com/pixelphone/answer/7158570?hl=en&ref_topic=7530176
Global
3xCA, 2x2 MIMO
Supports CAT 11 (up to 600Mbps download), CAT 5 (up to 75Mbps upload)
GSM/EDGE: Quad-band (850, 900, 1800, 1900 MHz)
UMTS/HSPA+/HSDPA: Bands 1/2/4/5/8
Verizon
LTE: Bands 1/2/3/4/5/7/8/12/13/17/20/25/26/28/32/38/40/41/66
North America
LTE: Bands B1/2/3/4/5/7/8/12/13/14/17/20/25/26/28/29/30/38/40/41/66/71
eSIM
Japan
UMTS/HSPA+/HSDPA: All global bands and 6/19
LTE: Bands 1/2/3/4/5/8/12/13/17/18/19/21/26/28/38/41
Europe (including UK) & Asia Pacific (except Japan)
LTE: Bands 1/2/3/4/5/7/8/12/13/17/20/25/26/28/32/38/40/41/66
eSIM