Short answer: If you get hundreds of inbound calls a day and need one short number, VoIP is a good choice. If your reps make most of the calls themselves, travel a lot, and customers also message them on Telegram or WhatsApp, a SIM-card phone with dooCall usually works better: more calls get answered, reps are not tied to a desk, and managers keep control.
A manager digitising a sales team usually chooses between IP telephony (VoIP) and employees' ordinary mobile phones. Both have their place. The choice should follow your sales model, not the technology.
What is VoIP and how is it different from a SIM call?
VoIP (IP telephony) carries calls over the internet; the number is tied to a virtual PBX rather than a mobile operator's SIM card. A SIM call goes through the mobile network from a regular phone.
VoIP's strengths are well known: call queues, voice menus, one number, routing between agents. In a sales team, other things often matter more.
Six criteria compared
1. Mobility
With VoIP, a rep usually sits at a computer or softphone. Mobile softphones exist but depend on internet quality. With dooCall, an ordinary phone works as a call center anywhere: on site, at a client's office, on the road. Every call is still recorded.
2. Answer rates
The most expensive thing in sales is an outbound call nobody picks up. Hiya reports that 46% of unidentified calls go unanswered and 92% of consumers believe such calls are fraudulent (Hiya, 2024). A Pew survey found that 80% of US adults generally do not answer calls from unknown numbers (Pew Research, 2020).
Many people see virtual and landline numbers as ads or spam. A mobile number the customer saved as "Aziz, furniture" looks familiar. That difference shows up in answer rates, and therefore in sales.
3. Customers reach their own rep
With VoIP, a customer calls a shared number and gets the next free agent, then has to explain everything again. With a SIM model, the customer calls the salesperson they know. In long B2B deals, real estate or car sales, that personal link matters for closing.
4. SMS, Telegram and WhatsApp
A VoIP number may not receive SMS, and setting up a messenger on it can be hard. Even if it works, several agents using one account in parallel is awkward. On a SIM work phone, the rep handles calls, SMS and messengers from one number. The number and the phone belong to the company, so they stay when the employee leaves.
5. Infrastructure and setup
VoIP needs a virtual PBX, a SIP trunk, headsets and often a specialist to configure it. dooCall needs an app on an Android 10+ phone and a login (there is no iPhone version, because iOS does not allow call recording). Pricing is simple: 49,000 UZS per phone per month.
6. Control and reporting
Here the gap is small. Both approaches record calls and push them to the CRM. dooCall integrates with Bitrix24, amoCRM and Odoo and reports on calls, missed calls, talk time and operators. It also logs where the employee was at the moment of each call.
Which one should you choose?
VoIP fits when:
- you get hundreds of inbound calls a day that need queueing;
- agents work shifts in the office;
- a single short number matters for the brand.
A SIM phone with dooCall fits when:
- reps mostly call customers themselves;
- staff spend a lot of time in the field, on sites or at clients;
- customers deal with a personal manager and message them;
- you want to start fast without extra infrastructure.
Many companies run both: a short number for inbound traffic and dooCall work phones for the sales team.
What changes with dooCall?
- Reps call from anywhere, and every conversation is recorded and lands in the CRM.
- A familiar mobile number improves the odds that outbound calls get answered.
- Customers talk to their own manager, while the history stays with the company.
- AI analysis scores conversations and gives reps advice; Deep Vision configures it for your business and script, at 549 UZS per minute.
Frequently asked questions
Should we drop VoIP completely?
No. If inbound volume is high, keep VoIP and move the sales reps to dooCall.
Won't a mobile number get flagged as spam?
A regular mobile number, especially one the customer saved, looks more familiar than a virtual one. But with hundreds of cold calls a day, any number can attract complaints.
Is call recording legal?
In Uzbekistan it is done under Law No. ZRU-547 "On Personal Data", with employee consent and customer notice. Check with your lawyer. More: Is call recording legal?
Sources
Related: What is dooCall, call control without a call center, why customers don't answer sales calls.
We'll help you pick the right setup for your sales team. Send a request or call +998 77 093 00 07.