diff --git a/rendercv/data_model.py b/rendercv/data_model.py
index b18f3c3..5cc3482 100644
--- a/rendercv/data_model.py
+++ b/rendercv/data_model.py
@@ -788,12 +788,12 @@ class PublicationEntry(Event):
     @classmethod
     def check_doi(cls, doi: str) -> str:
         doi_url = f"https://doi.org/{doi}"
-        
+
         try:
             urllib.request.urlopen(doi_url)
         except:
             raise ValueError(f"{doi} cannot be found in the DOI System.")
-        
+
         return doi
 
     @computed_field
@@ -833,21 +833,33 @@ class Connection(BaseModel):
     ]
     value: str
 
+    @field_validator("value")
+    @classmethod
+    def check_type_of_value(
+        cls, value: str
+    ) -> str:
+        if not re.search(r"[^\d\-+]", str(value)):
+            # If there is nothing other than digits, hyphens, and plus signs, then it is
+            # a phone number
+            value = "tel:" + value
+        
+        return value
+
     @computed_field
     @cached_property
     def url(self) -> HttpUrl:
         if self.name == "LinkedIn":
             url = f"https://www.linkedin.com/in/{self.value}"
         elif self.name == "GitHub":
-            url = f"https:www.github.com/{self.value}"
+            url = f"https://www.github.com/{self.value}"
         elif self.name == "Instagram":
             url = f"https://www.instagram.com/{self.value}"
         elif self.name == "email":
             url = f"mailto:{self.value}"
         elif self.name == "website":
-            url = f"{self.value}"
+            url = self.value
         elif self.name == "phone":
-            url = f"{self.value}"
+            url = self.value
         elif self.name == "location":
             url = None
         else:
diff --git a/rendercv/templates/components/classic/header_connections.tex.j2 b/rendercv/templates/components/classic/header_connections.tex.j2
index eb1dc0c..0da8719 100644
--- a/rendercv/templates/components/classic/header_connections.tex.j2
+++ b/rendercv/templates/components/classic/header_connections.tex.j2
@@ -8,11 +8,11 @@
 ((*- endmacro *))
 
 ((* macro Instagram(username, url) -*))
-\mbox{\href{}{{\small\faInstagram}\hspace{0.13cm}<<username>>}}
+\mbox{\href{<<url>>}{{\small\faInstagram}\hspace{0.13cm}<<username>>}}
 ((*- endmacro *))
 
 ((* macro phone(number, url) -*))
-\mbox{{\footnotesize\faPhone*}\hspace{0.13cm}<<number|replace("tel:", "")|replace("-"," ")>>}
+\mbox{\href{<<url|replace("-","")>>}{{\footnotesize\faPhone*}\hspace{0.13cm}<<number|replace("tel:", "")|replace("-"," ")>>}}
 ((*- endmacro *))
 
 ((* macro email(email, url) -*))
diff --git a/tests/test_rendercv.py b/tests/test_rendercv.py
index a09b19c..07e056c 100644
--- a/tests/test_rendercv.py
+++ b/tests/test_rendercv.py
@@ -482,6 +482,32 @@ class TestRendercv(unittest.TestCase):
         result = publication.doi_url
         self.assertEqual(result, expected)
 
+    def test_data_connection_url(self):
+        # Github link:
+        inputs = [
+            {"name": "LinkedIn", "value": "username"},
+            {"name": "GitHub", "value": "sinaatalay"},
+            {"name": "Instagram", "value": "username"},
+            {"name": "phone", "value": "+909999999999"},
+            {"name": "email", "value": "example@example.com"},
+            {"name": "website", "value": "https://www.example.com/"},
+            {"name": "location", "value": "My Location"},
+        ]
+        expected_results = [
+            "https://www.linkedin.com/in/username",
+            "https://www.github.com/sinaatalay",
+            "https://www.instagram.com/username",
+            "tel:+909999999999",
+            "mailto:example@example.com",
+            "https://www.example.com/",
+            None,
+        ]
+        for input, expected in zip(inputs, expected_results):
+            with self.subTest(type=input["name"]):
+                connection = data_model.Connection(**input)
+                result = connection.url
+                self.assertEqual(result, expected)
+
 
 if __name__ == "__main__":
     unittest.main()