How Call Tracking Software Works: SIM Apps, Cloud Numbers, Ads

Call tracking software works in one of three ways: an app syncs the call log from each salesperson's phone, a cloud business number logs every call that passes through it, or a separate tracking number on each ad records which campaign made the phone ring. Indian businesses usually mean the first two, tracking a team's calls, with SIM trackers from ₹159 per user a month; US vendors usually mean the third, ad attribution.

For a team's calls (the first two methods), the core record is the same: the number, date and time, direction, duration, answered or missed, and who handled it. Recordings, outcomes and links to a lead vary by product. Ad tracking records the source instead, and in India Google doesn't pass on the caller's number.

What is call tracking software?

Call tracking software records data about phone calls so a business can see and act on them. The words cover two different jobs:

• Tracking your team's calls: who called which customer, for how long, which calls were missed, and what happened. This is what most Indian buyers want.
• Tracking which ad drove a call: each campaign gets its own number, so calls can be counted per ad. This is what CallRail and other US tools sell.

"B2B call tracking" in US vendor blogs means the second job for long sales cycles, linking a company buyer's call to a campaign and then to a CRM deal. For an Indian B2B seller, such as a machinery distributor, it usually means the first: every enquiry answered, logged against the lead and followed up.

Method 1: SIM call-log sync

This is how Callyzer, Runo, RMDialer and Salestrail work. Reps keep calling from their own SIMs.

1. You install the tracker app on each salesperson's phone, usually Android, and allow it to read the call log.
2. The rep makes or takes a call on the phone's normal SIM.
3. Android writes the call to the phone's call log: number, time, direction and duration.
4. The app picks up the new entry and uploads it to the vendor's cloud.
5. If the phone recorded the call, the app uploads the recording as well.
6. The dashboard shows calls per rep, talk time and missed calls nobody returned.

What limits it. Google Play lets an app read call logs only if it is the default dialer or Google grants it an exception, and business CRM is on the exception list (Google Play policy). iPhones are harder: Callyzer is Android only, RMDialer's iPhone app has every feature except the call log, and Salestrail lists call tracking on both.

Recording is the weak point. Play apps may not use Android's Accessibility API for "remote call audio recording" (Google Play policy), so trackers rely on the phone's built-in recorder: Callyzer syncs recordings from employees' devices, and Salestrail uses the built-in recorder or its own APK. Of the tools named here, only Salestrail says it tracks WhatsApp calls, and only on Android.

For a comparison of the SIM trackers themselves, see our Callyzer alternatives guide.

Method 2: cloud business number

Here the call runs through the provider's platform instead of a SIM, so the platform itself keeps the record.

1. A customer dials your business number, the one on your website, invoices and Google profile.
2. The call reaches the provider's platform, not a SIM in someone's pocket.
3. The platform applies your routing rules: a team, a department, whoever is available, or after-hours rules.
4. It rings the chosen team members, in the provider's app or on their mobiles, and whoever answers takes the call.
5. The platform logs the call against the business number: caller, time, who answered, duration, or missed.
6. If recording is on, the platform can play an announcement and stores the audio. Some products then transcribe it.

What limits it. A rep's calls from a personal SIM are invisible to it. The business also needs a number first, and providers run KYC before they issue one; our virtual number guide lists the usual documents.

TalkEasy by GrowEasy works this way: the whole team can share one number, every call is logged against it whoever answers, and recorded calls start with an announcement. After a call, TalkEasy transcribes the recording and writes an AI call summary with the customer's requirement, objections and next follow-up. Disclosure: TalkEasy is our product.

Method 3: tracking numbers for ads

This is what "call tracking" means in the US: finding out which ad, listing or hoarding made the phone ring.

1. Each source gets its own phone number: one for the Google ad, one for the newspaper ad, one for the hoarding.
2. On a website, dynamic number insertion (DNI) uses a script to show each visitor a number chosen by how they arrived.
3. The customer dials the number they saw.
4. The tracking provider forwards the call to your normal line and notes which number was dialled.
5. Because each number maps to one source, calls are counted per ad or campaign.

In India. Google Ads does this itself with Google forwarding numbers, which are available in India, but Google doesn't show the caller's number for Indian calls (Google Ads Help). CallRail, the best-known DNI vendor, offers call tracking only in the US, Canada, the UK and Australia (CallRail Help). Our guide to tracking which ad drove a call in India covers the options and their rupee costs.

Which method do you need?

Telecalling CRMs such as TeleCRM and NeoDove add a lead list on top of method 1 or 2, so each call lands on the right lead.

Many small teams combine two: a shared business number for enquiries, plus Google Ads call reporting to see which ads produce calls. To compare named products and prices, read our guide to sales call tracking software in India.

See it on a shared number

If your team answers enquiries on one business number, TalkEasy logs every call made or received on it, whoever answers, and TalkEasy call analytics shows total calls, answer rate, missed calls, average talk-time and peak calling hours, with per-agent reports you can download. For calls reps make on their own SIMs, use method 1; to see which ad made the phone ring, use method 3.

Last reviewed 24 September 2026.