Fairphone 4: 4G supported bands: B1/B2/B3/B4/B5/B7/B8/B12/B18/B19/B20/B28/B32/B38/B40/B41/B71 5G supported bands: n1/n3/n5/n7/n8/n20/n28/n38/n41/n71/n77/n78
Fairphone 5: 4G supported bands: B1/B2/B3/B4/B5/B7/B8/B12/B20/B28/B32/B38/B40/B41/B42/B48/B66/B71 5G supported bands: n1/n2/n3/n5/n7/n8/n20/n28/n38/n41/n48/n66/n71/n77/n78
Relevant comment about Fairphone 4 in the USA
TL;DR: By adding band 66, Fairphone 5 has better compatibility with cellular network providers in the USA. Band 48 also gives better compatibility with Verizon. T-Mobile is still the best for Fairphone in the USA.
Fairphone 4:
4G supported bands: B1/B2/B3/B4/B5/B7/B8/B12/B18/B19/B20/B28/B32/B38/B40/B41/B71
5G supported bands: n1/n3/n5/n7/n8/n20/n28/n38/n41/n71/n77/n78
Fairphone 5:
4G supported bands: B1/B2/B3/B4/B5/B7/B8/B12/B20/B28/B32/B38/B40/B41/B42/B48/B66/B71
5G supported bands: n1/n2/n3/n5/n7/n8/n20/n28/n38/n41/n48/n66/n71/n77/n78
Relevant comment about Fairphone 4 in the USA
TL;DR: By adding band 66, Fairphone 5 has better compatibility with cellular network providers in the USA. Band 48 also gives better compatibility with Verizon. T-Mobile is still the best for Fairphone in the USA.