Allows users tracking the condition of the other telephone or the subscriber, for example, there will appear a signal on the screen of the telephone device informing that the subscriber is on the line and is temporarily unavailable.
AKCALL (pvt) ltd [btcl,iplc,stm]
our company name AKCALL (pvt) ltd.we provide bd cli stm,iplc,igw and a2z termination good rate and good voice quilty.we btcl huge port if any body need plz contect
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