Hi Chaitanya,
Thank you for reaching out to us. I looked at
AdCallMetricsConversion and
WebsiteCallMetricsConversion and unfortunately they both do not support the phone number field. However, I can put in a request for this to be added. In the meantime, please follow our blog on this for updates and new releases.
For your second query, I see that you're asking about mobile website source. Could you please clarify if you're talking about conversions from websites on mobile devices?
Thank you,
Bryan, Google Ads API Team

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