Malaysia's telecoms regulator plans to reallocate two spectrum bands for wireless communication to four mobile phone network operators this year, as part of a government plan to generate extra revenue from their use.The Malaysian Communications and Multimedia Commission in a statement late on Monday said it would reallocate the 900MHz and 1800MHz bands to Maxis Bhd, DiGi.Com Bhd, Axiata Group Bhd's Celcom Networks Sdn Bhd and U Mobile Sdn Bhd