The first phone that would come to my mind is the CMF Phone 1, it’s a cheap (200 bucks) 5G phone where you can detach the back to reveal the inside of the phone.

The phone have been made with customization in mind, so the back is removable for you to change it as you please. Even if you’re not supposed to replace the battery, that makes it fairly easy for you to access and replace it.

Otherwise, you could consider getting a Fairphone. Even if they’re pricey for the hardware, they’re the most durable phone you can get since you can replace everything you want, whenever you want.

Here are some videos showcasing both phones if you want to check for yourself:

CMF Phone 1 (this is a review, but he talks about its main features)

Fairphone 6 (this is the last phone they released, but they also have previous phone cheaper)

They make new phones with removable batteries still? Point me in that direction, please lol

Cheapest guarantees you will be missing some 5G bands, might as well just focus on LTE. It will be around for years to come.

That being said, Galaxy Xcover Pro series is probably the way to go, just find an older model for “cheapest.”

If any, it would be a cheap Chinese brand like Doogee or something. Probably the most reputable one you will find is the Samsung Galaxy XCover series.

But honestly, every smartphone has a replaceable battery. Just buy a new battery and follow a video guide, it’s a low cost and simple process for every mainstream phone. It kills me a little bit every time I see people giving up on their perfectly usable phones because they don’t want to pay someone else to replace the battery for them…just do it yourself guys.

You have 2 features to demand, and one of them is 5G?