mobile

I'm looking to purchase this f510s/k model from Amazon

But i'm getting conflicting info about the bands.

According to one on amazon:
2G GSM900, GSM1800, GSM1900
3G UMTS1900 (B2), UMTS2100 (B1)
4G LTE2100 (B1), LTE850 (B5), LTE1800 (B3), LTE2600 (B7), LTE900 (B8)


Yet this one says
2G GSM: 900 / 850 / 1800 / 1900 MHz 3G WCMA: 2100 / 1900 / 850 MHz (Band: 1 / 2 / 5) 4G LTE: 2100 / 1800 / 850 / 2600 / 900 / 700 MHz (Band: 1 / 3 / 5 / 7 / 8 / 17)

Both for the same type of phone, just different colour (would post links but the forum isnt allowing me to)

Which one is correct? I need GSM 850 and UMTS 2100 for my country's provider.

Also does anyone have this version of the phone? Does it work fine with AT&T / T-MOBILE?

Thanks