SIM Card Security

Getting Started

Y	Z	Packet Data — You are ready to
		transfer packet data or are
		transferring packet data. See “Using
		Your Phone as a Modem” on page
		59.
N	O	TTY — You are ready to use your
		phone to make calls using a
		teletypewriter device. See “Making
		TTY Calls” on page 60.

Your SIM card stores all your Contacts and protects your personal information. Since this information is stored on your SIM card, not in your phone, you can remove the information by removing your SIM card.

Note: Except for making emergency calls, your phone will not function without the SIM card.

To prevent unauthorized use of your phone, your SIM card is protected by a PIN that you enter each time the phone is powered on. You can change the PIN or turn off the requirement that it be entered.

Turning the PIN Requirement On and Off

When the SIM PIN requirement is off, your phone can be used without entering a PIN.

Important: When the SIM PIN requirement is off, the personal data on your SIM card is not protected. Anyone can use your phone and access your personal data.

When the SIM PIN requirement is on, you are prompted to enter your PIN each time you power on your phone.

Note: If a SIM PIN is required, your phone will not function until the SIM PIN is entered, except for making emergency calls.

1From the main menu, select Settings > Security > SIM PIN.

2Select On or Off.

3Enter the current SIM PIN.

Note: The default SIM PIN is 0000. Change your PIN to prevent fraudulent use of the SIM card (see “Changing the PIN” on page 13).

4Press A under Ok.

i355 phone user's guide specifications

The Sprint Nextel i355 is a compact and rugged mobile phone designed for users who seek durability alongside essential communication features. Launched as part of Sprint Nextel's lineup, this device caters primarily to users who work in demanding environments, making it a popular choice among professionals in construction, logistics, and field services.

One of the standout features of the i355 is its robust design. The phone is built to withstand challenging conditions, featuring military-standard durability with resistance to shock, dust, and moisture. This makes it ideal for users who may expose their devices to harsh elements on job sites or outdoor environments.

The i355 utilizes Nextel's Direct Connect technology, allowing for quick push-to-talk communications that work like a walkie-talkie. This feature enables instant connectivity with colleagues across a vast network, facilitating real-time communication without the need for a call setup. The Direct Connect capability is especially valuable in work situations where prompt responses are critical.

In terms of display, the i355 is equipped with a 1.9-inch color screen, providing clarity for reading messages, checking settings, and navigating the user interface. The device also includes basic multimedia capabilities, such as a camera for capturing images and recording short videos, allowing users to document their work or share quick moments with others.

The i355 supports SMS and MMS, ensuring users can send text messages and multimedia content seamlessly. Users can also store important contacts, thanks to the phone’s built-in address book, which can hold a significant number of contacts, making communication management straightforward.

Battery life is another key characteristic of the i355, which features a long-lasting battery that is designed to keep users connected throughout the day, making it suitable for individuals who spend long hours on the job without access to charging facilities.

Furthermore, the phone supports a range of basic applications that facilitate daily tasks, enhancing overall productivity. Though the i355 may not boast advanced smartphone features, its reliability, ease of use, and focus on essential functions make it a favored choice for those who prioritize communication and durability in their work-related devices.

In summary, the Sprint Nextel i355 phone is an excellent option for users seeking a dependable, rugged device that excels in straightforward communication and resilience in various professional environments.

Sprint Nextel i355 phone user's guide SIM Card Security, Turning the PIN Requirement On and Off

Models: i355 phone user's guide

Getting Started