Q: Does the Sunstech CELT25 automatically answer when the lid is opened?

The Sunstech CELT25 does not have a flip lid , so it cannot automatically answer when a flap is opened. This phone features a fixed 2.8-inch color LCD screen (240x320 px) and a classic design. The only removable compartment of the CELT25 is the back cover , which allows access to the 1100 mAh Li-ion battery, SIM slots, and microSD slot. Opening this cover has no effect on calls. To answer a call on the CELT25, use the call/end call button provided for this purpose on the phone.

Q: How to set up speed dialing on the Sunstech CELT25?

Speed dialing on the Sunstech CELT25 allows you to assign up to 10 contacts to keys for instant access. Here’s how to set it up: Configuration Steps Access the Settings menu Select Speed Dial Assign your favorite contacts to the available keys Programmable Keys Keys 2 to 9 : 8 contacts Keys M1 and M2 : 2 additional contacts Usage Once configured, simply press and hold the assigned key from the idle screen to directly dial the contact's number without navigating through menus.

Q: How to correctly insert a SIM card into the Sunstech CELT25?

The Sunstech CELT25 is compatible with Nano SIM cards. It has two SIM card slots, allowing you to use two cards simultaneously. Insertion steps: Locate the battery compartment at the back of the device Open the battery compartment Identify the two SIM card slots marked SIM1 and SIM2 Present the SIM card so that the gold contacts of the card are facing down Ensure that the card is properly aligned in the slot - this is the crucial step if you encounter resistance Gently push until you hear a slight click indicating that the card is securely in place Close the battery compartment If you continue to experience difficulties: check that your SIM card is indeed of the Nano SIM format and not another format (Micro SIM, standard SIM). Incompatible format cards cannot be inserted correctly. If you are unsure about the format, contact your mobile operator to request a card in the correct format.

Question 1

Does the Sunstech CELT25 automatically answer when the lid is opened?

Accepted Answer

The Sunstech CELT25 does not have a flip lid, so it cannot automatically answer when a flap is opened. This phone features a fixed 2.8-inch color LCD screen (240x320 px) and a classic design.

The only removable compartment of the CELT25 is the back cover, which allows access to the 1100 mAh Li-ion battery, SIM slots, and microSD slot. Opening this cover has no effect on calls.

To answer a call on the CELT25, use the call/end call button provided for this purpose on the phone.

Question 2

How to set up speed dialing on the Sunstech CELT25?

Accepted Answer

Speed dialing on the Sunstech CELT25 allows you to assign up to 10 contacts to keys for instant access. Here’s how to set it up:

Configuration Steps

Access the Settings menu
Select Speed Dial
Assign your favorite contacts to the available keys

Programmable Keys

Keys 2 to 9: 8 contacts
Keys M1 and M2: 2 additional contacts

Usage

Once configured, simply press and hold the assigned key from the idle screen to directly dial the contact's number without navigating through menus.

Question 3

How to turn on the Sunstech CELT25?

Accepted Answer

To turn on the Sunstech CELT25, press and hold the end call/Power button located on the right side of the device for a few seconds until the screen lights up and you see the startup menu.

Before turning on the phone for the first time, make sure the following preparations are completed:

Battery inserted and charged - Insert the 1100 mAh Li-ion rechargeable battery into its slot located under the compartment. First, remove the plastic cover of the battery, insert it into its slot ensuring it aligns correctly with the metal contacts, then close the battery compartment.
Battery charged before first power on - Connect the provided charger (5V/0.5A adapter) and let it charge for at least one hour before the first power on.
SIM card inserted - Insert two Nano SIM cards into the SIM1 and/or SIM2 slots located under the battery compartment. Ensure that the SIM cards are properly aligned in their respective slots.
microSD card (optional) - To use the camera or store files, insert a microSD card up to 32 GB into its slot.

If the phone does not turn on after pressing the power button, check that the battery is not completely discharged. In this case, connect the phone to a charger for at least one hour without trying to turn it on, then try again. Also, ensure that the battery is properly inserted and that the metal contacts are clean and making good contact.

Once turned on, the phone will display its startup screen with an animation. The CELT25 is equipped with programmable software keys on the left and right, a 2.8-inch color LCD screen, a numeric keypad, as well as navigation keys and an SOS button for emergency situations.

To turn off the phone, press and hold the same end call/Power button. The phone will first enter sleep mode (the screen turns off but the device still receives calls and SMS), then it will completely turn off after a few seconds if you continue to hold the button.

Question 4

What position and orientation should the SIM card have in the Sunstech CELT25?

Accepted Answer

The SIM card must be inserted with the gold contacts facing down. The Sunstech CELT25 accepts two Nano SIM cards (SIM1 and SIM2), and correct alignment is essential for the card to be recognized.

Here is the precise procedure:

Open the battery compartment cover and remove the battery
Align the SIM card (gold contacts facing down) in the appropriate slot (SIM1 or SIM2)
Gently and firmly insert until you hear a slight click
Replace the battery and the cover

Important points: Never force the card. If it does not fit, check that it is indeed a Nano SIM (not a standard SIM card) and that the orientation of the gold contacts is facing down. The alignment must be precise in the slot.

Question 5

The SIM card does not fit into the slot of the Sunstech CELT25, what should I do?

Accepted Answer

If your SIM card does not easily fit into the slot of the Sunstech CELT25, here are some points to check before forcing it:

Correct format - The CELT25 only accepts Nano SIM cards. If you have a Micro SIM or a standard card, it will not fit. Check with your operator to ensure you have a Nano SIM.
Card orientation - The gold contacts of the card must be facing down. Turn the card over if necessary.
Alignment in the slot - Make sure the card is properly aligned with the corners and edges of the slot. The slots of the CELT25 (SIM1 and SIM2 at the back) are very precise.
Gently insert - Push the card in slowly and firmly, without forcing it. You should hear a slight click confirming that it is securely in place.

If the card remains stuck after these checks, the issue may be a deformation of the slot. In this case, please contact the manufacturer's support.

Question 6

How to correctly insert a SIM card into the Sunstech CELT25?

Accepted Answer

The Sunstech CELT25 is compatible with Nano SIM cards. It has two SIM card slots, allowing you to use two cards simultaneously.

Insertion steps:

Locate the battery compartment at the back of the device
Open the battery compartment
Identify the two SIM card slots marked SIM1 and SIM2
Present the SIM card so that the gold contacts of the card are facing down
Ensure that the card is properly aligned in the slot - this is the crucial step if you encounter resistance
Gently push until you hear a slight click indicating that the card is securely in place
Close the battery compartment

If you continue to experience difficulties: check that your SIM card is indeed of the Nano SIM format and not another format (Micro SIM, standard SIM). Incompatible format cards cannot be inserted correctly. If you are unsure about the format, contact your mobile operator to request a card in the correct format.

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