First Ever Mobile phone

Mine was the Samsung Glide. It was one of those phones that had a sliding keyboard. I got this in 2010, after I started my first job. I remember it was green, took me a while to get used to the keyboard.
 
It was Sony Ericsson T230. My uncle bought it for me when I was 6th grade of Elementary school and at that time it was one of the first phones in color. I was so happy and all the kids were amaized when they looked at it. Such super technology in my hands!

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My first phone was a Nokia 3310 with Sprint. It only had cell coverage at my house and lost reception in all the places where I needed it. Because of that, I canceled the 14-day free trial. Sprint still tried to charge the $300 cancellation fee and it was a hard fight to get out of that, even on like the 5th day.

Sprint coverage spread over the next year, but it left a sour taste in my mouth dealing with them. So, I chose to go with Verizon when I could afford a mobile plan.

So, I think my official first phone was the Motorola Razr v3 as that's the one I used the most before smartphone Android releases came along.
 
This is one of the reasons I don't make major changes to my tech stuff. I would always focus on staying safe and using it the way that it was meant to be used.
Unless it's paramount to change the smartphone, that's only when it's necessary to do so. If it's not, upgrading it is like throwing money away.