SIM-based calling CRM · the call leaves the handset
People answer a number that looks like a person.
SIM-based calling CRM by Telecalling Software, calling on your caller's own SIM.
Telecalling Software is a SIM-based calling CRM, so every call goes out on your caller's own SIM and comes back to the same phone. There is no virtual number, no minute rate and nothing bought from a telecom provider. The app becomes the phone app on an Android handset, the call is carried by the plan you already pay for, and the lead record opens with the call instead of being written up afterwards.
- SIM based calling CRM
- SIM based auto dialer
- SIM based telecalling CRM
- SIM based call management CRM
- Calling CRM on your own number
- Auto dialer app
- Free auto dialer app
- Telecaller job description
Nothing per minute, everWorks on a weak data signal
What is a SIM-based calling CRM?
A SIM-based calling CRM such as Telecalling Software places the call through the SIM card already in the caller's phone, instead of routing it over the internet through a virtual number. The customer sees an ordinary mobile number, the call is carried by the phone plan you already pay for, and the CRM sits on top recording who was called, what happened and what comes next. Telecalling Software works this way: the app becomes the phone app, so the lead record and the call are the same event.
SIM-based calling CRM vs cloud calling
Six things that change when the call leaves a handset.
| SIM-based, like Telecalling Software | Cloud calling | |
|---|---|---|
| What the customer sees | An ordinary mobile number, the same one every time, which can be saved in their contacts and called back. | A virtual landline or a number from a pool, often unfamiliar and sometimes flagged as spam by the handset. |
| Who carries the call | The caller's own phone plan. No per-minute charge reaches the software bill at all. | The provider, billed per minute or bundled into the seat with a monthly minute allowance. |
| When the internet drops | The call still connects. It is a normal phone call; only the syncing of the record waits for a signal. | Nothing connects. Voice runs over the same data the office just lost. |
| Calling back | The customer redials the number that rang them and reaches the same caller, with the lead record on screen. | A call to the virtual number reaches a queue, an IVR, or whoever is free. |
| Recording the call | Not possible. Current Android versions do not let a third-party app record a call, and no SIM-based product can get around it. | Possible, because the audio passes through the provider's servers on its way. |
| Working from anywhere | Anywhere the handset has signal. The caller carries the system in their pocket. | Anywhere with good internet, on a laptop with a headset, which suits a desk floor better than a field team. |
Neither column is better everywhere. A support floor that needs queueing and recordings wants the right-hand column; an outbound team calling its own enquiries wants the left.
Pick-up rate is the whole argument
A person who does not recognise a number decides in two rings. A familiar mobile number gets answered by people who would never answer a landline they do not know, and in India that gap is the difference between a productive morning and a wasted one. Nothing else on a feature list moves the number of conversations as much.
The cost of a call stops being a line item
There is no per-minute rate, no number rental, no calling credit to top up and nothing to forecast. A caller on an unlimited plan can talk all day and the software bill does not move. What you pay is per user, per month, and that is the whole of it.
Nothing new to buy or configure
No virtual numbers to provision, no routing rules, no telecom paperwork, no porting. A caller installs the app, signs in with their mobile number and starts the day. Most teams are dialling within the hour.
The lead record and the call become one thing
Because the app is the phone app, an incoming call from a number already in the list shows the lead before the caller says hello, and the outcome sheet appears as the call ends. There is no separate step where somebody is supposed to write it down afterwards.
SIM-based calling CRM limits
Five limits, stated plainly. These are properties of calling through a SIM, not gaps we intend to close. If one of them matters to your team, a cloud product is the honest answer and we would rather you knew now.
- No call recording. Android does not permit it for third-party apps, so no SIM-based product has it, and any that claims otherwise is worth a careful question.
- No IVR, no queues, no "press 1 for sales". Those need the call to pass through a server, which is exactly what this does not do.
- No iPhone app for callers. iOS does not let an app take over the dialer, so the calling half cannot work there. Managers use the browser dashboard from any device, including an iPhone.
- No predictive or parallel dialling. One SIM makes one call at a time, so the auto dialer is sequential: the next number rings as the last one ends.
- Each caller needs a handset and a SIM. For a team that already calls from their phones this costs nothing extra; for a floor of shared desks it is a real consideration.
SIM-based calling CRM price
Free to call. Paid to organise.
The calling half costs nothing, for good: the business dialer, dialling through a list, the filters, call analysis, analytics and the WhatsApp that goes out as you hang up. Free forever, for everyone. No card, no trial clock, no user limit.
The CRM half is where the money is: ₹161 for each user every month when billed by the year, or ₹251 on the three-month term, tax on top. That covers lead records and stages, handing leads between callers, follow-ups that ring, imports from a sheet or an API, bulk WhatsApp, and the dashboard a manager reads.
Because the calls ride on the phone plan, that per-user figure is the entire software cost. There is no second invoice for minutes at the end of the month, which is the part teams moving off a cloud dialer notice first.
SIM-based calling CRM FAQ
What is a SIM-based calling CRM?
- It is a CRM that puts the call through the SIM card already sitting in the caller's phone, rather than sending the voice over the internet. Because the app takes over as the phone dialer, placing a call, logging it, tagging the outcome and attaching it to a lead record all happen in one action. Telecalling Software works this way: an Android app in the caller's hand, a browser dashboard for whoever runs them.
How is SIM-based calling different from cloud calling?
- The difference is the wire. SIM-based calling uses the mobile network the handset is already on, so the customer sees a familiar mobile number and the phone plan carries the cost. Cloud calling routes voice over the internet through a virtual number, which makes recording, IVR and call queues possible but bills per minute and shows a number the customer does not know.
Does a SIM-based CRM cost anything per call?
- Nothing reaches the software bill. The call is an ordinary call on the caller's own plan, so there is no per-minute rate, no number rental and no credit to buy. Telecalling Software is ₹161 per user per month on yearly billing for the paid plan, and the calling features themselves are free forever.
Can a SIM-based calling CRM record calls?
- No, and neither can any other. Current versions of Android block third-party apps from recording a call, which applies to every app of this kind regardless of what it is sold as. What is kept instead is the record around the call: the number, the time, the duration, the outcome and the note the caller left.
Will my callers use their personal numbers?
- They use whichever SIM is in the handset. Many teams issue a work SIM so the business number stays with the business when someone leaves; others let callers use their own and transfer the lead records instead. The app works the same either way, and it reads a dual-SIM phone so the right one is used.
Does it work when the internet is slow or off?
- The calling does, because it is a normal phone call. Calls place and connect on the mobile network with no data at all. What waits for a signal is the syncing: outcomes, notes and new leads queue on the handset and upload when the connection returns, so nothing is lost on a patchy day.
Is a SIM-based auto dialer the same thing?
- The auto dialer is the part that keeps the calls coming. It walks a list and rings the next number as each call ends, with a short outcome sheet in between. It is SIM-based in the same sense: every one of those calls leaves the handset on its own SIM, one at a time, so there is no parallel or predictive dialling.
What happens when a customer calls back?
- The customer is calling the caller's actual number, so it rings that handset. Because the app is the phone app, the lead record opens with the incoming call: the name, the stage, the last note and the reason for the follow-up are on the screen before the caller speaks.
How many calls can one SIM make in a day?
- The limit is set by your operator, not by us. Indian networks throttle or block a SIM that behaves like a spam dialer, and the threshold varies by operator and plan. Teams calling genuine enquiries rarely reach it; teams blasting a cold purchased list usually do, which is a good reason not to do that.
Can a manager see the calls without a phone?
- Yes. Everything the callers do arrives on a web dashboard in any browser, on a laptop, a desktop or a tablet. The manager never installs the app or dials anything; they assign leads, watch outcomes per caller and follow up on what is pending.
Is SIM-based right for a call centre?
- Usually not. A floor taking inbound calls needs queueing, IVR and recording, and those require the call to pass through a server. SIM-based suits outbound teams calling their own enquiries from their own phones, which is a different job even though both are called telecalling.
What do I need before starting?
- An Android phone on Android 8 or newer for each caller, a SIM in it and a list of numbers. Nothing is bought from a telecom provider and nothing is configured. Install, sign in with a mobile number, import the list and dial.
How many callers can a SIM-based calling CRM handle?
- Practically, up to about thirty before the model starts to strain, and the limit is organisational rather than technical. Beyond that, teams usually need recording for quality scoring and inbound handling for callbacks at volume, and both push towards cloud telephony instead.
What happens to the customer relationship if a caller keeps their SIM?
- They keep the number and you keep the history, which is the split that matters. Every call, note, outcome and follow-up date lives in the account rather than the handset, so a departing caller cannot take the record with them even though the number was always theirs.
Is a SIM-based calling CRM good for a team that also sells in person?
- Yes, and it is one of the better fits, because the caller is already carrying the phone. A field salesperson can ring from the car park, log the outcome in two taps and set the next date without opening a laptop, which is more than can be said for most CRMs used on the move.
Your number.
Their answer.
The dialer and the analytics free forever, on the SIM you already have. Free for 3 days, no card.
Keep reading
More on the site
- Telecalling software for PCWhat a PC can and cannot do when the calls leave a phone.Open
- What is telecallingThe job itself: what it is, who does it, and how a day runs.Open
- Telesales CRM softwareThe same job under the word telesales, and where the two differ.Open
- Best telecalling CRMWhat makes a telecalling CRM good, answered one product deep.Open
- How many calls should a telecaller make in a day?how many calls should a telecaller make in a day: the maths by hand and with an auto dialer, and the number to target instead.Open
- How many times should you follow up a lead?how many times should you follow up a lead: by call and WhatsApp, the spacing that works in India, and when to stop.Open
Updated on · Facts checked September 2026