diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0363275d9..5018dd859 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,8 @@ Changelog
 
 **Next release**
 
+* Added restrictions for [SIP](http://en.wikipedia.org/wiki/Session_Initiation_Protocol) calling ([issue](/../../issues/1739))
+
 [Open issues](https://github.com/M66B/XPrivacy/issues?state=open)
 
 **Version 2.1.4 STABLE**
diff --git a/src/biz/bokhorst/xprivacy/Meta.java b/src/biz/bokhorst/xprivacy/Meta.java
index 22c6ab0c4..d0d4f68bb 100644
--- a/src/biz/bokhorst/xprivacy/Meta.java
+++ b/src/biz/bokhorst/xprivacy/Meta.java
@@ -62,6 +62,10 @@ public static List<Hook> get() {
 		mListHook.add(new Hook("calling", "android.intent.action.RESPOND_VIA_MESSAGE", "SEND_RESPOND_VIA_MESSAGE", 18, null, null).doNotify());
 		mListHook.add(new Hook("calling", "android.intent.action.CALL", "CALL_PHONE", 10, null, null).doNotify());
 
+		mListHook.add(new Hook("calling", "SIP.isApiSupported", "USE_SIP", 9, null, null).doNotify());
+		mListHook.add(new Hook("calling", "SIP.isVoipSupported", "USE_SIP", 9, null, null).doNotify());
+		mListHook.add(new Hook("calling", "SIP.newInstance", "USE_SIP", 9, null, null).doNotify());
+
 		mListHook.add(new Hook("clipboard", "addPrimaryClipChangedListener", "", 11, null, null));
 		mListHook.add(new Hook("clipboard", "getPrimaryClip", "", 11, null, null).doNotify());
 		mListHook.add(new Hook("clipboard", "getPrimaryClipDescription", "", 11, null, null).doNotify());
diff --git a/src/biz/bokhorst/xprivacy/XPrivacy.java b/src/biz/bokhorst/xprivacy/XPrivacy.java
index a11514d3f..a31f39ae2 100644
--- a/src/biz/bokhorst/xprivacy/XPrivacy.java
+++ b/src/biz/bokhorst/xprivacy/XPrivacy.java
@@ -139,6 +139,9 @@ protected void beforeHookedMethod(MethodHookParam param) throws Throwable {
 		// Settings secure
 		hookAll(XSettingsSecure.getInstances(), mSecret);
 
+		// SIP manager
+		hookAll(XSipManager.getInstances(), mSecret);
+
 		// SMS manager
 		hookAll(XSmsManager.getInstances(), mSecret);
 
diff --git a/src/biz/bokhorst/xprivacy/XSipManager.java b/src/biz/bokhorst/xprivacy/XSipManager.java
new file mode 100644
index 000000000..04128a552
--- /dev/null
+++ b/src/biz/bokhorst/xprivacy/XSipManager.java
@@ -0,0 +1,64 @@
+package biz.bokhorst.xprivacy;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import android.util.Log;
+
+public class XSipManager extends XHook {
+	private Methods mMethod;
+
+	private XSipManager(Methods method, String restrictionName) {
+		super(restrictionName, method.name(), "SIP." + method.name());
+		mMethod = method;
+	}
+
+	private XSipManager(Methods method, String restrictionName, int sdk) {
+		super(restrictionName, method.name(), "SIP." + method.name(), sdk);
+		mMethod = method;
+	}
+
+	public String getClassName() {
+		return "android.net.sip.SipManager";
+	}
+
+	// @formatter:off
+
+	// static boolean isApiSupported(Context context)
+	// static boolean isVoipSupported(Context context)
+	// public static SipManager newInstance (Context context)
+	// http://developer.android.com/reference/android/net/sip/SipManager.html
+
+	// @formatter:on
+
+	private enum Methods {
+		isApiSupported, isVoipSupported, newInstance
+	};
+
+	public static List<XHook> getInstances() {
+		List<XHook> listHook = new ArrayList<XHook>();
+		listHook.add(new XSipManager(Methods.isApiSupported, PrivacyManager.cCalling));
+		listHook.add(new XSipManager(Methods.isVoipSupported, PrivacyManager.cCalling));
+		listHook.add(new XSipManager(Methods.newInstance, PrivacyManager.cCalling));
+		return listHook;
+	}
+
+	@Override
+	protected void before(XParam param) throws Throwable {
+		if (mMethod == Methods.isApiSupported || mMethod == Methods.isVoipSupported) {
+			if (isRestricted(param))
+				param.setResult(false);
+
+		} else if (mMethod == Methods.newInstance) {
+			if (isRestricted(param))
+				param.setResult(null);
+
+		} else
+			Util.log(this, Log.WARN, "Unknown method=" + param.method.getName());
+	}
+
+	@Override
+	protected void after(XParam param) throws Throwable {
+		// Do nothing
+	}
+}