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Best SIM based auto dialer

Best SIM based auto dialer: seven apps that dial from your own number

The best SIM based auto dialer works through a lead list using the card inside the handset, which means the person answering sees an ordinary mobile number rather than a rented line. Calling CRM leads this list, followed by six other apps judged on SIM handling and retries.

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Own-number dialling only
Dual SIM and redial checked
Facts dated 23 October 2026

Updated 23 October 2026

Product illustration with sample data

TL;DR · SHORT ANSWER

What is the best SIM based auto dialer?

Pick one that rings from the work SIM, labels each call with its SIM and redials drops. Calling CRM does all three; five others state own-SIM dialling.

Dual SIM control and dropped-call redial: Calling CRM
Reseller or API needs on a SIM dialler: RMDialer
Android-only office team that works offline: Telecalling Software

The list

Best SIM based auto dialer: the 7 apps, compared for own-number calling

The cards look at what happens at the SIM: which card a call uses, how each call is labelled and what the app does when a number fails to connect. Placing is editorial.

1
Calling CRM
callingcrm.in

Best for: dual SIM phones where work and personal numbers share one handset.

On a two-SIM handset the caller either picks a card call by call or nominates one as the work line; afterwards every history row carries that card’s name, older Android releases included. Backup can be limited to chosen cards, keeping a private number away from the account.
When poor signal kills a call before the other phone even rings, the session quietly tries that number twice more and only then files the lead as unreached. Normal no-answers go into a 1 to 3 retry queue. See the SIM based auto dialer page for the settings.

Worth knowing: SIM names in the call history come from the Android call log. On iPhone the app works without that built-in log, which Apple does not share with apps.
See Calling CRM
2
RMDialer
rmdialer.com

Best for: firms that want a SIM dialler they can rebrand or connect by API.

rmdialer.com sells its dialler as running on the caller’s own SIM, inside one plan it says holds 67 features, plus a call-log API and a reseller scheme.

Worth knowing: Retry rules and dropped-call handling are not described on its site.
RMDialer vs Calling CRM, in detail
3
Telodial
telodial.com

Best for: teams of 2 to 50 callers who also want a desk click-to-dial.

On telodial.com, calls are placed from each caller’s own card, and a desk click in Chrome can set off a call on the handset.

Worth knowing: Its site does not describe dual SIM labelling or automatic redial.
Telodial vs Calling CRM, in detail
4
AutoDial CRM
autodialcrm.in

Best for: lists that sometimes need WhatsApp instead of the card.

autodialcrm.in lets a list run on the card or through WhatsApp, and offers to sync customer conversations alone.

Worth knowing: No redial counts or dropped-call rules are stated.
AutoDial CRM vs Calling CRM, in detail
5
Dialmio
dialmio.com

Best for: Android teams that want SIM calls tied to marketplace and ad leads.

Dialmio describes SIM-based dialling on Android 8 and later and states plainly that it does no predictive dialling.

Worth knowing: No iPhone app, by its own statement; retry behaviour is not described.
Dialmio vs Calling CRM, in detail
6
Telecalling Software
telecallingsoftware.com

Best for: office callers on Android who sometimes lose signal.

The app at telecallingsoftware.com dials from each caller’s own SIM, says it works offline, and rules out virtual numbers and ringing several lines at once.

Worth knowing: It says it does not record call audio, and retry rules are not described.
Telecalling Software vs Calling CRM, in detail
7
NLCaller
nlcaller.com

Best for: teams that care most about automatic retries.

nlcaller.com lists an auto dialler with one to three retries for unanswered numbers, on Android and iPhone.

Worth knowing: Its site does not use own-SIM wording or describe dual SIM handling, so it sits at the end of this list.
NLCaller vs Calling CRM, in detail

This list is written by Calling CRM. The order is our editorial choice, with our own app first; use each "Best for" line and the table to pick what fits you. Facts about other apps come only from their own websites, checked 23 October 2026. Other companies are independent of Calling CRM.

Features

Best SIM based auto dialer comparison table

What each site states about the SIM side of dialling.

The SIM side of seven diallers, as their makers describe it on 23 October 2026
App	Own SIM stated	Dual SIM choice	Redials no-answers	Dropped calls	Best for
Calling CRM	Yes	Per call or a default work SIM	1 to 3 retries	Redialled up to 2 times	Dual SIM phones
RMDialer	Yes (per rmdialer.com)	Not stated	Not stated	Not stated	Rebranding, API
Telodial	Yes (per telodial.com)	Not stated	Not stated	Not stated	Small teams
AutoDial CRM	Yes, or WhatsApp (per autodialcrm.in)	Not stated	Not stated	Not stated	SIM or WhatsApp lists
Dialmio	Yes (per dialmio.com)	Not stated	Not stated	Not stated	Android lead sellers
Telecalling Software	Yes (per telecallingsoftware.com)	Not stated	Not stated	Not stated	Offline office teams
NLCaller	Not stated	Not stated	1 to 3 retries (per nlcaller.com)	Not stated	Retry-heavy lists

How we chose the best SIM based auto dialer

Only apps that place calls from the phone made the list; anything built on rented numbers belongs to a different category. We then looked for four SIM-level details on each maker’s own site: a clear own-SIM statement, a way to choose the card on dual SIM phones, a rule for numbers that do not answer, and a rule for calls the network cuts.

Our notes on the six rivals come straight from their own pages. Calling CRM is our app and goes first, as we openly state; the remaining order tracks how much of the SIM side each maker documents.

SIM based auto dialer India: a dual SIM test drive

Put a work SIM and a personal SIM in one test phone and see which card the dialler uses.
Open the call history afterwards: is every call labelled with the right SIM name?
Switch off mobile data mid-session; SIM calls should still go out.
Ask how a call cut by poor signal is treated, retried or counted as not reached.
Check whether personal calls on the second SIM can be kept out of the backup.

SIM based auto dialer or cloud dialler: which one fits

A SIM dialler suits mobile teams who want customers to see a familiar mobile number and who do not need IVR menus or shared lines. A cloud setup suits seated teams who need one number ringing across many desks.

Our guide to SIM based calling vs cloud telephony walks through both, and the best auto dialer app list ranks the whole calling session rather than just the SIM.

Best SIM based auto dialer limits of this list

Only phone-based diallers are ranked. Cloud telephony, virtual numbers and predictive dialling are outside it.
A blank in the table means the site did not say, not that the feature is missing.
Carrier rules and calling regulations differ by country; none of this is legal advice.
Pricing is deliberately absent, and the details mirror each site’s wording on the day we checked.

FAQ

Best SIM based auto dialer FAQ

Which call dialer is best for calling from your own SIM?

A dialler that uses the work SIM, labels each call and retries cleanly is best. Calling CRM does all three; RMDialer, Telodial, Dialmio, AutoDial CRM and Telecalling Software also state own-SIM calling.

Is Calling CRM the best SIM based auto dialer?

For dual SIM phones and patchy networks it is the strongest fit on this list. If you need a dialler you can rebrand and resell, RMDialer offers that and Calling CRM does not.

Does a SIM based auto dialer need mobile data to call?

Not for the call itself, which uses the mobile network. An internet connection is still needed for syncing calls and leads to the business account.

Can a SIM based auto dialer use the second SIM on a dual SIM phone?

In Calling CRM, yes: pick the card per call or set one as the default for business. The other six sites do not describe dual SIM choice.

What does a SIM based auto dialer do when the network drops a call?

Calling CRM rings that number again by itself, up to two times, before counting the lead as not reached. None of the other sites describe a rule for dropped calls.

Will customers see my own number with a SIM based auto dialer?

Yes. Calls go out on the SIM in the phone, so the person sees that mobile number, not a rented virtual line.

Which SIM based auto dialer apps also work on iPhone?

Four of the SIM diallers here, ours plus RMDialer, Telodial and AutoDial CRM, come with iOS apps; Dialmio and Telecalling Software stick to Android.

Do any of the best SIM based auto dialer apps need extra hardware?

No. Every app on this list runs on an ordinary smartphone and uses the SIM already inside it. Hardware GSM diallers are a different product, usually for alarms.

How many retries should a SIM based auto dialer make?

One to three is common. Calling CRM lets you choose one to three retries, after the list, after a set time or right away.

Can personal calls stay private in a SIM based auto dialer?

In Calling CRM you choose which SIMs back up and can exclude numbers from backup and automation, so a personal card and its calls can be kept out.