A SIM based dialer app sends each call out over the phone's own mobile connection, at the tariff you already pay. RMDialer is one for Android, dialing from whichever slot you choose.
No virtual numbers · No per-minute meter · The number stays yours
Your own SIM, no virtual number · Android and iPhone apps + Web CRM in one plan · No card for the trial
Updated
Short answer
A SIM based dialer app is a phone app that places calls through the SIM card in the handset, instead of over the internet or a rented virtual number. RMDialer is one for Android: customers see your ordinary mobile number, calls bill on the voice plan you already pay, the number stays yours, and calling keeps working when data drops. It also carries the lead record, the auto dialer and follow-up reminders, for ₹159 per user per month on the yearly plan in India ($29 per user per year, or $12 per user for 3 months, outside India). Call recording is supported and set up during training; IVR menus remain a cloud telephony job.
Key takeaways
What a calling team gains when the dialer uses the mobile connection already in each phone.
An unlimited voice pack covers the calling, so the monthly cost is the per-user fee and nothing that grows with talk time.
The customer’s screen shows an ordinary mobile number from their own region, which gets answered more often than an unknown virtual line.
The connection stays in the company’s name through a change of operator, a change of software or a change of staff.
Voice goes over the network the way any phone call does, so a weak data signal delays the syncing of notes but never stops a call.
On a dual-SIM handset the work slot does the dialing, and the second number never reaches a customer list by mistake.
The same screen that places the call shows the lead, saves the outcome and sets the reminder, so there is no second tool to update.
The two ways a dialer app can place a call. RMDialer is the SIM based kind.
| Point | SIM based dialer (RMDialer) | Internet dialer |
|---|---|---|
| Number the customer sees | Your ordinary local mobile number | A virtual number |
| What a call costs | Whatever your voice plan charges | Per-minute charges |
| When mobile data drops | Calls keep working | Calls stop |
| Your number | Belongs to your business and can be ported | Rented from the provider |
| Call recording | Supported, set up in training | Built in |
| IVR menus | Not part of a SIM dialer | Built in |
A dialer is only as good as the SIM behind it. Six things that follow from the hardware rather than the software: they are the reason to choose this category, and the reason it has limits.
Outgoing calls bill on the plan in the handset, so a caller on an unlimited-voice pack costs the same at 40 calls as at 240. There is no second meter, which is the whole arithmetic difference against a per-minute platform.
Operators in India and many other countries can apply fair-usage limits to outgoing calls on consumer plans, and a handset that suddenly makes hundreds of calls a day can trip one. A business or corporate connection is the fix, and it is worth asking the operator before scaling a desk, not after.
Because the calls leave your own connection, the number belongs to your business rather than to a vendor. If you change software the number does not move, which is not true of a virtual number rented from a platform.
On a two-slot handset the app dials from the slot you nominate, so the business connection carries the work and the personal one stays personal. Getting this wrong once is how a personal number ends up on a thousand customer phones.
Caller-ID apps and carriers score numbers on how people react to them. Volume to strangers earns reports; volume to people expecting the call does not. The flag follows the number, so one bad campaign damages every other call that number makes.
When each caller has their own connection, dials, connects and talk time can be counted per number as well as per person, which is what lets an owner see that one particular SIM has quietly stopped connecting.
Not the architecture argument, the invoice one. Six lines a desk actually notices.
What a call costs
Your existing voice plan. Usually already unlimited.
Per minute, per leg, on top of the seat.
What the customer sees
An ordinary local mobile number.
A virtual number or a shared prefix.
Who owns the number
You do. Port it, keep it, take it with you.
The platform. It ends when the contract does.
Setup time
Install, choose the slot, import the list.
Provisioning, number allocation, KYC, routing.
When the data drops
Calls continue. Records sync later.
Calls stop, because the call is the data.
Where it struggles
Very high volume campaigns and IVR menus.
Small teams, warm lists, price sensitivity.
Real businesses, real numbers: how owners and sales teams across India and 12+ countries use RMDialer every day.
“Renewal reminder is the reason I pay for it. Every policy due date rings me 30 days, 7 days and 1 day before, with the client's number right there. Earlier 3 to 4 renewals a year quietly went to other agents. Small app, big difference for a single agent like me.”
“GST and ITR deadlines mean 200 client calls in a fortnight. The auto dialer runs the list, the remark goes on the client's number, and the ones who said "documents by Friday" ring the assistant on Friday. A follow up reminder app that lives inside the phone dialer is the only kind my staff will keep using.”
“I am a one-person business. RMDialer is the business dialer app on my own phone: every customer call becomes a record, the wedding date is the reminder, and the new collection goes out as a WhatsApp broadcast to my 600 customers from the call log. Paid clients tab shows who has paid and who has balance due.”
“Earlier I was dialling 80 to 100 portal leads a day by hand from Excel. With RMDialer auto dialer app I import the sheet, press start and it calls one by one from my own Jio SIM. Between calls I mark Interested or Site visit in two taps and the follow-up rings me on time. Closed 3 flats last month from leads I would have forgotten.”
“Best CRM dialer we have used for a small team. Call comes in, the lead card is already on screen with the last remark, and the status change is two taps. Only complaint: the web CRM export could use more filters. Otherwise our 6 person sales team lives in it.”
“Arabic auto dialer and CRM app on our Vodafone SIMs. Showroom enquiries are followed up on time, the WhatsApp catalogue goes after every call, and I see each salesperson's calls for the day. Cheaper than any call centre product we were quoted and no virtual numbers customers ignore.”
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A pump distributor in Coimbatore, and the week the calls stopped going out.
A pump distributor in Coimbatore put six people on the phone for a monsoon-season push, on ordinary retail connections bought from a local shop. For two weeks it worked. In the third, two of the six found their outgoing calls failing intermittently from mid-afternoon, with no message beyond the call not connecting. The software was fine. The connections had crossed a fair-usage threshold that nobody had thought to ask about, because at forty calls a day it had never been near.
The fix took a phone call to the operator and a move onto business connections, and it has not recurred. The useful lesson is the order of operations: this is a question to settle before a desk scales, not after, and it is one that a per-minute platform genuinely does remove, since the carrier relationship is theirs rather than yours. That is a real cost of the SIM based approach and it belongs on this page next to the savings.
Ask any vendor in this category what happens at three hundred calls a day per handset. The ones who have run real desks will tell you about connection types and fair-usage thresholds. The ones who have not will tell you the software has no limit, which is true and beside the point.
The dialer is one piece of a wider SIM setup. How a list is paced one call at a time is on the SIM based power dialer, a whole desk run on phones is SIM based call center software, and a proprietor with two phones and a counter should start from a SIM based CRM for small business.
All of these describe the same arrangement: the call leaves through the SIM in the phone rather than over the internet. People reach for whichever half of it they care about, the dialling or the connection, which is why the phrase moves around so much. If you are comparing the tools that work this way rather than reading about the approach, the shortlist of SIM-based tools puts them side by side with prices.
You will also see it called sim based auto dialer, sim calling app, sim based calling app and mobile sim dialer. They describe the same thing, so whichever phrase brought you here, this is the page for it.
Business connections rather than personal ones, one per caller, and a word with the operator if the desk will run high daily volumes.
The app becomes the phone dialer and dials from the slot you choose, so the business connection carries the calls and the personal one is left alone.
Not just per person. A single connection whose connect rate is sliding is a reputation problem, and it shows up here weeks before anybody complains.
The one you nominate, and it stays nominated. RMDialer dials the business connection while the second slot carries personal calls untouched, which matters because the number a caller uses for work ends up saved in hundreds of customer phones. Getting the slot right on day one saves an awkward migration later.
Consumer plans carry fair-usage thresholds on outgoing calls, and a handset that jumps from forty calls a day to three hundred can trip one. The answer is a business or corporate connection rather than a retail pack, and a short conversation with the operator before a desk scales up rather than after it has been throttled.
Whatever your voice plan already charges, which on an unlimited-calls plan is nothing per call. That is the arithmetic that decides this category: RMDialer is ₹159 per user per month in India, or $29 per user per year, or $12 per user for 3 months, outside India, and the talking is free on your existing pack, where a cloud platform charges a seat fee and then meters every minute on top of it.
Blocked outright is rare. Throttled or flagged is common, and it usually follows a burst of calls to people who did not expect them. Keep the desk on business connections, keep the list warm, and the volume itself is not the problem: operators see high-volume business numbers every day without acting on them.
Caller-ID apps build their labels from how people react. Calls to strangers get ignored, cut or reported, and enough of those attach a label to the number. The uncomfortable part is that the label then applies to every call that number makes, including the ones to customers who know you, so a single cold campaign can quietly cost a desk its warm connect rate.
Yes, on handsets that support it. The app dials through whichever connection the phone presents, physical or embedded, so an eSIM business line behaves exactly like a plastic one. Older devices that predate eSIM are unaffected, since nothing here depends on the SIM being a particular shape.
Nothing, from the app's side. The number stays with you through a port, which is one of the quieter advantages of this arrangement: the connection is yours rather than rented, so switching operator, or switching software, does not cost you the number customers have saved.
It works wherever the handset can place a call, so a caller travelling keeps working and international teams run it on their own local connections. Roaming charges are between the caller and their operator, exactly as they would be for any other call, because RMDialer is not carrying the voice.
In practice yes, one per person. Sharing a number across a desk destroys the thing that makes this work: the customer calls back and reaches whoever answers, the callback history stops meaning anything, and per-number reporting collapses into one undifferentiated line.
If the connection is in the company's name, the handset and the number come back and the next person picks up a line customers already have saved. If it was the employee's personal connection, the relationships walk out with them. This is the single strongest argument for issuing business connections rather than reimbursing personal ones.
No, and it is not trying to. RMDialer is a SIM based dialer app in the literal sense: it hands the call to the handset's own connection. If your requirement is IVR menus or numbers that live in a platform, cloud telephony is the correct category and the honest recommendation.
Below roughly twenty callers, comfortably, because the per-minute line is the one that grows. Model a full year at your real headcount and real talk time: the seat fee is the number vendors quote, and the minutes are the number that decides it. Above that scale, and where IVR menus are required, the gap narrows and can reverse.
Yes. Call recording is supported on RMDialer, and our team sets it up with you during training, handset by handset, so the setup matches the phones your callers actually use. Tell callers and customers about recording wherever your local law asks for it.
As many as you have callers: pricing is per user, so a desk of four and a desk of forty differ only in the count. Every caller gets their own queue and their own numbers, and the owner sees all of them in one place without anybody sending a summary at the end of the day.
Android 8 or newer, and the permissions any phone dialer needs: calls, contacts and the call log, plus notification access for the reminders. It asks to become the default phone app, which is what lets the customer record appear during the call rather than in a separate screen afterwards.
Lead automation
Leads from 15+ platforms → auto-assigned round robin → auto dialed → updated. On its own.
Facebook, JustDial, IndiaMART, portals, sheets, Excel: every lead gets an owner and a place on a calling list, then reports its own outcome.
The business dialer is free forever with no account and no expiry: the keypad, contacts, caller ID, the call log and your call analytics, plus free WhatsApp sends every day. A plan adds the customer record after every call, follow-up reminders, list auto dialing, your team and WhatsApp automation.
Free WhatsApp sends every day with a free account: 15 a day for your first 15 days, then 3 a day. The dialer itself needs no login at all.
$29 per user per year, or $12 per user for 3 months, outside India
Try it free for 3 days: unlimited use, no credit card required. Prices are per user, exclusive of taxes.
Business karte ho? Business Dialer chahiye.
Set it as your phone app in one tap. Everything works like before, and then it starts working FOR you.
₹159/user/month on yearly in India, $29/user/year elsewhere · every feature included · Prices are per user, exclusive of taxes.
Free forever: the business dialer never expires, and needs no account
Call recording supported · our team sets it up with you during training
On iPhone and Android. The iPhone app has every feature except the native call log.
