Question: I have 4 tables 

```
     - User
        - UserId
        - UserName

     - Device
        - DeviceId
        - DeviceTypeId (FK DeviceType)

     - DeviceType  
        - DeviceTypeId

     - UserDevice  
       - UserId (FK User)
       - DeviceId (FK Device)

```

I would like to get list of devices that 1 user has, grouped by DeviceType. So result class should be something like this

```
class m
{
   int DeviceTypeId;
   List<Device> devices;
}

```

I did try few tricks in LINQ but didnt get desired result. It has been years since I used LINQ last time.

Answer: 
You must add this permission in your AndroidManifest.xml

```
<uses-permission android:name="android.permission.SEND_SMS">

```

Did you?
Make sure that u added sms send permission in the Manifest.xml file