Thanks for you questions.  I think it is very easy to make calls from any kind of cell phone . All instructions you will get from the user manual of your cell phone. Ok as you don’t know, I’m trying to tell you in details on How to make call in Samsung Galaxy Grand Prime Mobile?

Making calls from Samsung Galaxy Grand Prime

1. Tap Phone on the Apps screen.
2. Tap Keypad, enter a phone number, and then tap or to make a voice call.  (You will noticed that you are calling to your desire number )

Making calls from Samsung Galaxy Grand Prime

1. Tap Phone on the Apps screen.
2. Tap Keypad, enter a phone number, and then tap to make a video call.

Making calls from call logs or contacts list

1. Tap Logs or Contacts,
2. and then drag a contact or a phone number to the right to make a call.

Making calls from the favorites list
You can easily call contacts that you communicate with frequently by adding them to the favorite contacts list.

Make a Calls firm contact

1. To add contacts to the favourites list,
2. tap Contacts, select a contact, and then tap .
3. To make a call to a favourite contact, tap Favourites and select a contact.

Number prediction of Samsung Galaxy Grand Prime

1. Tap Keypad.
2. When entering numbers on the keypad, automatic predictions appear.
3. Select one of these to make a call.

Make calls via Speed dial numbers

1. Tap Keypad.
2. For speed dial numbers, tap and hold the corresponding digit.

To assign a contact to a speed dial number,

1. tap and hold an available speed dial number on the keypad,
2. tap OK, and then select a contact. Alternatively, tap → Speed dial,
3. select a number, and then select a contact.

Making an international call

1. Tap Keypad.
2. Tap and hold 0 until the + sign appears.
3. Enter the country code, area code, and phone number, and then tap

Receiving  or Answering a call

1. When a call comes in, drag outside the large circle.
2. If the call waiting service is activated, another call can be answered.
3. When the second call is answered, the first call is put on hold.

Rejecting a call

1. When a call comes in, drag outside the large circle.
2. To send a message when rejecting an incoming call, drag the reject message bar upwards.
3. To create various rejection messages (You can create your customs rejection massage), open the Apps screen and tap Phone →: → Settings → Call → Set up call reject messages → +.

Missed calls

1. If a call is missed, appears on the status bar.
2. Open the notifications panel to view the list of missed calls.
3. Alternatively, on the Apps screen, tap Phone → Logs to view missed calls.

Options during calls

During a voice call
The following actions are available:
• Add call: Dial a second call.
• Keypad: Open the keypad.
• End call: End the current call.
• Speaker: Activate or deactivate the speakerphone. When using the speakerphone, speak
into the microphone at the top of the device and keep the device away from your ears.
• Mute: Turn off the microphone so that the other party cannot hear you.
• Bluetooth: Switch to a Bluetooth headset if it is connected to the device.
• → Hold: Hold a call. Tap Resume call to retrieve the held call.
• → Contacts: Open the contacts list.
• → Memo: Create a memo.
• → Messages: Send a message.
• → Extra volume: Increase the volume.
• → Settings: Change the call settings.

During a video call
The following actions are available:
• → Hide me: Hide your image from the other party.
• → Outgoing image: Select an image to show it to the other party.
• → Capture image: Capture the other party’s image.
• → Record video: Record a video of the other party’s images.
• → Memo: Create a memo.
• → Messages: Send a message.
• → Keypad: Open the keypad.
• → Speaker off / Speaker on: Activate or deactivate the speakerphone. When using the speakerphone, speak into the microphone at the top of the device and keep the device away from your ears.
• → Switch to headset / Switch to phone: Switch sound output to a connected Bluetooth headset or back to the device’s speaker.

Tap the screen to use the following options:
• Switch: Switch between the front and rear cameras.
• Mute: Turn off the microphone so that the other party cannot hear you.
• End call: End the current call.

I think you have got your questions answers  of Samsung Galaxy Grand Prime Mobile. If you searching for unlock code instructions for free then visit:  https://unlockcodesamsung.blogspot.com