fix: Restricted text characters in Mobile fields
diff --git a/app/src/main/res/layout/fragment_form_customer_address.xml b/app/src/main/res/layout/fragment_form_customer_address.xml
index 75cbf74..80e6a48 100644
--- a/app/src/main/res/layout/fragment_form_customer_address.xml
+++ b/app/src/main/res/layout/fragment_form_customer_address.xml
@@ -63,7 +63,8 @@
                             android:id="@+id/et_city"
                             android:inputType="text"
                             android:layout_height="wrap_content"
-                            android:layout_width="match_parent"/>
+                            android:layout_width="match_parent"
+                            android:digits="@string/restrict_a_zA_Z"/>
                     </android.support.design.widget.TextInputLayout>
 
                     <android.support.design.widget.TextInputLayout
@@ -91,7 +92,8 @@
                             android:id="@+id/et_country"
                             android:inputType="text"
                             android:layout_height="wrap_content"
-                            android:layout_width="match_parent"/>
+                            android:layout_width="match_parent"
+                            android:digits="@string/restrict_a_zA_Z"/>
                     </android.support.design.widget.TextInputLayout>
 
                     <android.support.design.widget.TextInputLayout
@@ -105,7 +107,8 @@
                             android:id="@+id/et_region"
                             android:inputType="text"
                             android:layout_height="wrap_content"
-                            android:layout_width="match_parent"/>
+                            android:layout_width="match_parent"
+                            android:digits="@string/restrict_a_zA_Z"/>
                     </android.support.design.widget.TextInputLayout>
 
                 </LinearLayout>
diff --git a/app/src/main/res/layout/fragment_form_customer_details.xml b/app/src/main/res/layout/fragment_form_customer_details.xml
index 0965a90..0b0f7a6 100644
--- a/app/src/main/res/layout/fragment_form_customer_details.xml
+++ b/app/src/main/res/layout/fragment_form_customer_details.xml
@@ -48,6 +48,7 @@
                             android:hint="@string/required_account"
                             android:id="@+id/et_account"
                             android:inputType="text"
+                            android:digits="@string/restrict_a_zA_Z0_9"
                             android:layout_height="wrap_content"
                             android:layout_width="match_parent"/>
                     </android.support.design.widget.TextInputLayout>
@@ -62,6 +63,7 @@
                             android:hint="@string/required_first_name"
                             android:id="@+id/et_first_name"
                             android:inputType="text"
+                            android:digits="@string/restrict_a_zA_Z"
                             android:layout_height="wrap_content"
                             android:layout_width="match_parent"/>
                     </android.support.design.widget.TextInputLayout>
@@ -76,6 +78,7 @@
                             android:hint="@string/optional_middle_name"
                             android:id="@+id/et_middle_name"
                             android:inputType="text"
+                            android:digits="@string/restrict_a_zA_Z"
                             android:layout_height="wrap_content"
                             android:layout_width="match_parent"/>
                     </android.support.design.widget.TextInputLayout>
@@ -90,6 +93,7 @@
                             android:hint="@string/required_last_name"
                             android:id="@+id/et_last_name"
                             android:inputType="text"
+                            android:digits="@string/restrict_a_zA_Z"
                             android:layout_height="wrap_content"
                             android:layout_width="match_parent"/>
                     </android.support.design.widget.TextInputLayout>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index be6386c..6aab32d 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -387,6 +387,9 @@
     <string name="please_wait">Please wait &#8230;</string>
     <string name="logging_in">Logging in…</string>
 
+    <string name="restrict_a_zA_Z" translatable="false">abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ</string>
+    <string name="restrict_a_zA_Z0_9" translatable="false">abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890</string>
+
     <string-array name="loan_application_steps">
         <item>Loan details</item>
         <item>Debt to income ratio</item>