Using a dual-band mobile phone, which works in both the 900MHz and 1800MHz bands, will also give you a better chance of successfully contacting the 999 emergency centre.

 
  • 此外,双频型号的流动电话能在900兆赫及1800兆赫的波段内操作,因此,有较大机会成功联络999紧急热线中心。
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