diff --git a/README.md b/README.md
index 990bcd9..b0477d0 100644
--- a/README.md
+++ b/README.md
@@ -84,3 +84,8 @@ second cape prototype built, using CircuitPro + ProtoMat S63
 bugs:
 - one ground copper connection in the plane cut because too thin
 - 100nF dim the UART signals and should be removed
+
+D:
+4 phone prototypes built to work with the cape
+bugs:
+- the central tab is a bit too long. it's hard to remove the battery
diff --git a/hardware/version b/hardware/version
index 3cc58df..1784810 100644
--- a/hardware/version
+++ b/hardware/version
@@ -1 +1 @@
-C
+D
diff --git a/release/hardware-release_vD.tar.gz b/release/hardware-release_vD.tar.gz
new file mode 100644
index 0000000..657189f
Binary files /dev/null and b/release/hardware-release_vD.tar.gz differ