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What is the difference between D6603 , D6616, D6633, D6643 and D6653 ? I know that some of them are dual sim, but I would like to know the difference of non-dual mopdels.
Thanks
How do we know which is the correct model for our network? I'm looking at buying a Z3 on eBay and it's a D6603. I would use it on Vodafone 3G/4G in the UK. Any help much appreciated.
Many thanks. Much appreciated.
excuse me because I dont know the differences of LTE bands and those numbers... so please tell me who is the best D6653 or D6603 
6633 and 6603 are best for europe
I want to buy a Z3 to be used in the Caribbean, Trinidad and Tobago to be exact which model will be suitable for my country?
It's all about the LTE frequencies
2G Network GSM 850 / 900 / 1800 / 1900 - D6603, D6643, D6653, D6616
3G Network HSDPA 850 / 900 / 1700 / 1900 / 2100 - D6603, D6643, D6653, D6616
4G Network LTE
700/800/850/900/1700/1800/1900/2100/2600 (1/2/3/4/5/7/8/13/17/20) - D6603 LTE 700/800/850/900/1700/1800/1900/2100/2600 (1/2/3/4/5/7/8/17/20) - D6643 LTE
700 / 850 / 900 / 1800 / 2100 / 2600 - D6653
LTE 700 / 1700 / 1900 / 2100 - D6616