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How truecaller will notify about the upcoming call before few seconds?

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How Truecaller will notify about the upcoming call before few seconds of the call received ?
Does true caller can read about the paging message?
If yes how? If no then how truecaller will know about the upcoming call before receiving

posted Jan 23, 2020 by anonymous

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1 Answer

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I dont think, USER application reads the MODEM level messages. TRUE caller might be regiosterd an URC notification in telphony package of ANDROID. Which will give incoming call notification to application like " Call (default app ), Truecaller or any other app which is expecting. From this True caller is displaying in mobile. Reading modem message is most of the time prohibited by modem vendors like qualcomm,etc.

answer Jan 24, 2020 by Jaganathan
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