IVR

Interactive voice response: the recorded menu that answers a business number and routes callers by the key they press. It runs on cloud telephony.

Only if incoming calls must be routed between departments or answered without staff. If the problem is remembering customers and following up, a call screen with the customer's record does more than a menu.

A power dialer calls one number at a time for one agent and waits for that call to end, so every answered call has a person ready. A predictive dialer calls several numbers at once and connects the ones that answer to whichever agent is free, which needs a call-centre server and causes dropped "silent" calls. Mobile auto dialers like RMDialer are power dialers on a SIM.

A SIM-based dialer places calls from the SIM in the user's own phone, so the customer sees a normal mobile number and the call costs whatever the operator plan charges. Cloud telephony routes calls through a virtual number on a server and bills per user plus per minute, in return for features like IVR and recording. For outbound sales on mobile numbers, SIM calling gets answered more often and costs far less.

No. A virtual number is only needed when calls must be routed through a cloud platform, for example for an inbound IVR. An outbound sales team can run entirely on business SIMs in the reps' phones, with the app logging every call and the owner reading the reports. Customers also answer known mobile numbers more readily than unfamiliar virtual ones.

Because caller ID apps and phone dialers increasingly flag pooled virtual and VoIP numbers as spam or business calls, and because the same virtual number is often used for many campaigns. A real mobile number from a local SIM looks like a person calling, which is why SIM-based dialers report higher connect rates in India.

Yes. On a dual-SIM Android phone the dialer lets you choose which SIM makes each call, or set a default business SIM for all sessions. You can also decide which SIM's calls are backed up and reported, so personal calls on the other SIM stay out of the team account.

Call from a real SIM rather than a pooled virtual number, keep daily volumes reasonable, do not call DND numbers with offers, save your business name in Truecaller and similar caller ID apps, and send a WhatsApp before or after the call so the customer recognises you. Numbers get flagged by patterns of unanswered cold calls, not by calling your own enquiries.

For outbound sales on mobile numbers, SIM-based: higher answer rates, no per-minute bills, calls that need no mobile data, runs on phones the team already has. For high-volume inbound with IVR, queues and recording, cloud call-centre software. Many businesses run both: cloud for the support line, SIM-based for the sales team.

An auto dialer app calls a list of phone numbers one after another so the caller never types a number. On Android, an app like RMDialer runs the session on the phone itself using the SIM already in it: you pick a list from Excel, a Google Sheet, an API or assigned leads, press start, and the app dials each number in turn while you mark the outcome between calls.

A telecalling CRM is customer software built around phone calls: the lead list, the dialer, the call outcome and the follow-up live in one place. The mobile kind, such as RMDialer, replaces the Android phone app on each rep's handset so every call automatically becomes a record with a status, a remark and the next follow-up, and the manager sees the whole team on a web dashboard.

Telecalling software is built to make and track calls (dialing lists, call logs, per-caller reports). A CRM is built to hold customer records and pipeline stages. Most Indian sales teams need both at once, which is why a telecalling CRM combines them: the call itself creates and updates the customer record, so nobody types into a separate system after the call.

A CRM dialer is a single app where the dialer and the customer record are the same thing: the call screen shows the lead, and ending the call updates it. It differs from a CRM with "dialer integration", which is two products joined by a sync. RMDialer is a CRM dialer for Android that runs on the user's own SIM.

A business dialer app replaces the default phone app on an Android phone with one made for selling: caller ID from your own leads, the last remark on screen when a customer rings, two-tap status and follow-up after each call, automatic WhatsApp, and a call log that filters by lead status. It is a personal CRM for one owner and a team system when several people use it.

The dialer is free forever. Install it, make it your phone app and you keep the keypad, contacts, call log, caller ID, spam screening and your call analytics with no account, no payment and no expiry date. Free WhatsApp sends are included every day once you make a free account. What you pay for is the memory around the call: the lead status, the remark and the follow-up reminder saved against every number, plus list auto dialing, team reports, backup and WhatsApp automation.