Turn your Android phone into a professional business phone. Compare free and paid SIP apps with push notifications, battery optimization, and seamless VoIP calling on the go.
A SIP softphone transforms your Android device into a full-featured business phone. Instead of carrying a separate desk phone or being tied to your office, you can make and receive calls from anywhere with an internet connection.
Cost Savings
Use your existing mobile data or WiFi instead of cellular minutes. International calls cost a fraction of traditional rates.
One Number, Any Device
Your business phone number rings on your desk phone, computer, and mobile simultaneously.
Remote Work Ready
Work from home, coffee shops, or while traveling. Stay connected to your PBX system anywhere.
Professional Features
Call transfer, hold, conference calling, and voicemail - all on your smartphone.
Best Free Android Softphones
These apps offer excellent SIP functionality without any cost. Perfect for testing or users who do not need advanced features.
Oliphone
Best Overall Free Option
Free
A powerful open-source SIP client with excellent codec support and push notification capabilities. Supports multiple accounts, TLS/SRTP encryption, and has a clean modern interface.
Push Notifications
TLS/SRTP
Multiple Accounts
Video Calls
Oliphone Lite
Lightweight & Battery Friendly
Free
A stripped-down version focused on minimal battery consumption. Ideal for users who primarily receive calls and want the app running in the background without draining battery.
Low Battery Usage
Background Mode
Simple UI
Linphone
Open Source & Cross-Platform
Free
Fully open-source SIP client that works identically across Android, iOS, Windows, Mac, and Linux. Great for organizations that need consistent behavior across all platforms.
Open Source
Cross-Platform
Video & Messaging
TLS/SRTP
Oliphone+
Free Tier with Premium Features
Freemium
Offers a generous free tier with one SIP account, basic push notifications, and standard codecs. Upgrade to unlock multiple accounts and HD voice codecs.
1 Free Account
Basic Push
Clean Interface
Best Paid Options
Paid apps typically offer better push notification reliability, priority support, and advanced features like call recording or CRM integration.
Oliphone Pro
Best for Business Users
$4.99/mo
The professional version with guaranteed push notifications, HD voice codecs (Opus, G.722), call recording, and 24/7 support. Perfect for business users who cannot miss incoming calls.
Guaranteed Push
HD Voice (Opus)
Call Recording
24/7 Support
Oliphone+ Premium
Multi-Account Power User
$2.99/mo
Upgrade from the free tier to unlock unlimited SIP accounts, advanced push notifications, HD codecs, and contact sync with your CRM systems.
Unlimited Accounts
CRM Integration
HD Codecs
Oliphone Enterprise
MDM & Mass Deployment
Contact Sales
Enterprise-grade solution with MDM integration, remote provisioning, centralized management console, and custom branding options for large deployments.
MDM Support
Remote Provisioning
Custom Branding
SLA Support
Building this? Your PBX will need a number
Find a phone number for your trunk
Local numbers $1.50 a month, toll-free $2.00, $1.00 one-time setup. Pick one here and it carries into signup.
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SIP apps can drain battery if not configured properly. Here is how to optimize your Android softphone for all-day use.
Use Push Notifications
Apps with push support do not need to maintain a constant connection. The server wakes the app only when a call arrives, saving significant battery.
Disable Battery Optimization
Go to Settings > Apps > Your SIP App > Battery > Unrestricted. This prevents Android from killing the app in the background.
WiFi vs Mobile Data
WiFi uses less battery than cellular data. When on WiFi, a typical call uses about 0.5-1 MB per minute with G.711 codec.
Choose Efficient Codecs
Opus and G.729 use less bandwidth than G.711. On limited data plans, these codecs can reduce usage by 80%.
Estimated Data Usage Per Hour of Calling
Codec
Bitrate
Data/Hour
Quality
G.711 (ulaw/alaw)
64 kbps
~30 MB
Excellent
G.722 (HD Voice)
64 kbps
~30 MB
HD Quality
Opus
6-128 kbps
~3-60 MB
Adaptive
G.729
8 kbps
~4 MB
Good
Configuring for IPComms SIP Trunk
Setting up your Android softphone with IPComms is straightforward. Use these settings to connect your app to our SIP service.
IPComms SIP Settings
Setting
Value
Notes
SIP Server
sip.ipcomms.net
Primary server
Username
Your SIP username
From portal
Password
Your SIP password
From portal
Auth Username
Same as username
If required
Transport
TLS (recommended)
Or UDP/TCP
Port
5061 (TLS) / 5060 (UDP)
Default ports
Codecs
G.711 ulaw, Opus
Priority order
SRTP
Enabled
With TLS transport
Quick Setup Steps
1
Download your chosen softphone from the Google Play Store
2
Open the app and navigate to Account or SIP Settings
3
Enter your IPComms credentials from the customer portal
4
Enable TLS transport and SRTP for encrypted calls
5
Save and verify the registration status shows "Connected"
Push Notifications & Background Mode
Push notifications are essential for receiving calls when your app is not actively running. Without push, your phone must maintain a constant SIP connection, draining battery.
Settings > Apps > [Your SIP App] > Mobile data & WiFi > Allow background data
Disable Adaptive Battery (if issues persist)
Settings > Battery > Adaptive Battery > Off (affects all apps)
Our Top Pick
Oliphone Pro
Best overall for Android SIP calling in 2026
For most users, Oliphone Pro offers the best combination of reliability, features, and value. The guaranteed push notifications mean you will never miss an incoming call, even when your phone has been idle for hours.
If you are on a budget, Oliphone (free) is an excellent alternative that handles most use cases. For enterprise deployments requiring MDM integration and centralized management, consider Oliphone Enterprise.
Free Users
Oliphone or Linphone
Business Users
Oliphone Pro
Enterprise
Oliphone Enterprise
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