Add Infinix Smart 3 Plus (spinel)

Change-Id: I1fb8154a670b5a21d4e0f484988fd16ebb2d520a
diff --git a/_infinix/infinixsmart3plus.markdown b/_infinix/infinixsmart3plus.markdown
new file mode 100644
index 0000000..985f723
--- /dev/null
+++ b/_infinix/infinixsmart3plus.markdown
@@ -0,0 +1,25 @@
+---
+layout: device
+title: "Infinix Smart 3 Plus"
+codename: spinel
+downloadfolder: spinel
+supportstatus: Current
+maintainer: Amy
+oem: Infinix
+mtkchipset: mt6761
+devicetree: "https://github.com/TeamWin/android_device_infinix_spinel"
+---
+
+{% include disclaimer.html %}
+
+{% include supportstatus.html %}
+
+{% include appinstall.html %}
+
+{% include download.html %}
+
+{% include twrpinstall.html %}
+
+{% include fastbootinstall.html %}
+
+{% include mtkinstall.html %}