diff --git a/rules/singbox/Wifi_Call_US.json b/rules/singbox/Wifi_Call_US.json
new file mode 100644
index 0000000..5a48d4f
--- /dev/null
+++ b/rules/singbox/Wifi_Call_US.json
@@ -0,0 +1,27 @@
+{
+  "version": 1,
+  "rules": [
+    {
+      "domain": [
+        "crl.t-mobile.com"
+        "eas3.msg.t-mobile.com"
+        "mascns.t-mobile.com"
+        "ns.sipgeo.t-mobile.com"
+        "epdg.epc.mnc240.mcc310.pub.3gppnetwork.org"
+        "epdg.epc.mnc260.mcc310.pub.3gppnetwork.org"
+        "ss.epdg.epc.mnc260.mcc310.pub.3gppnetwork.org"
+        "ss.epdg.epc.geo.mnc260.mcc310.pub.3gppnetwork.org"
+      ],      
+      "domain_suffix": [
+        "depdg.epc.mnc260.mcc310.pub.3gppnetwork.org"
+        "optimizely.com"
+        "redirect.ultra.me"
+        "ultramobile.com"
+      ],
+      "ip_cidr": [
+         //"ocsp.sectigo.com"
+        "88.82.0.0/19"
+         // CMLinkUK EE
+        "46.68.0.0/17"
+         // Giffgaff
+        "87.194.0.0/16"