Sales teams don’t all sell the same way. Some work from desks. Others live on their phones. Choosing the wrong calling setup leads to missed calls, low rep adoption, and unreliable CRM data.
Every phone-driven sales team must choose between SIM-based mobile calling or cloud telephony (VoIP).
This page helps you quickly see which option fits your sales model—and why mobile-first teams choose Salestrail.

Best for: Field sales, relationship sales, and mobile-first teams
How It Works
Sales reps call prospects directly from their own mobile phones, using the same numbers they use every day.
Calls happen through:
- Their SIM card (mobile network)
- WhatsApp or WhatsApp Business
No new numbers. No extra tools. Just normal mobile calling.
Higher answer rates - Prospects trust real mobile numbers. SIM calls see up to 60% higher pickup rates than cloud calls.
Better call quality - Mobile networks are more stable than internet calls. No lag, no drops.
More personal conversations -Mobile and WhatsApp calls feel natural, not automated — building trust instantly.
No behavior change for reps - No extra apps or dialers. Reps call the way they already do.
Cost-efficient - Domestic mobile calls are affordable, and WhatsApp calls are free.
Built for how sales works today - WhatsApp is a dominant sales channel globally.
This is the default way sales teams already sell.
Best for : Call centers and inside sales teams working from desks
How It Works
Cloud telephony uses VoIP, meaning calls are made over the internet via browser-based or app-based phone systems.
Sales reps call from assigned business numbers, not their personal mobiles. What Cloud Telephony Is Good At-
- Centralized calling for teams
- IVR, routing, and call queues
- Fast setup for desk-based teams
- Cost-efficient international calling
Best suited for structured, office-based calling environments.
Lower answer rates - Unfamiliar numbers get ignored.
Unreliable on mobile - Internet calls drop or lag on the move.
Sounds automated - Prospects sense a system, not a person.
Low rep adoption - App switching slows reps down.
Higher costs & blind spots - Per-minute pricing, plus no visibility into SIM or WhatsApp calls.


|
SIM-Based Calling (Salestrail)
|
Cloud Telephony |
| Real mobile numbers | Virtual or business numbers |
| GSM + WhatsApp calls | Internet-based VoIP calls |
| Higher answer rates | Lower answer rates |
| Stable mobile call quality | Internet-dependent quality |
| Native phone dialer | Browser or softphone |
| Full visibility into SIM & WhatsApp | No SIM or WhatsApp visibility |
| Built for real sales teams | Built for call centers |
Your sales reps work on the move, not from desks
Answer rates matter to hitting targets
WhatsApp is part of your sales conversations
You want accurate CRM activity without forcing reps to change how they call
You run a desk-based call center
Reps follow scripted, high-volume workflows
Most calls are made from a browser or softphone
- SIM-based calling is where real sales conversations happen.
- Cloud telephony is optimized for structured calling environments.
Salestrail bridges the gap — giving sales leaders full visibility into mobile sales activity, without changing how reps already sell.

Markus Tandefelt
Lauri Hyry
Salesforce user since 2010
Arshdeep Sharma
Sales Director, WhiteHat Jr
Markus Tandefelt
Fredrikinkatu 33 A,
00120 Helsinki, Finland
Call :+358 40 768 3813
Email: support@liid.com