You can replace the battery on them with a screwdriver, hot air, and some bravery to slightly bend the original battery as you rip it out. Then you can remove t

You can replace the battery on them with a screwdriver, hot air, and some bravery to slightly bend the original battery as you rip it out. Then you can remove the adhesive and not have to worry about doing that again, until your next "non-replaceable battery" phone. Considering any functional smartphone should be able to net you at least $80-100, and the battery can be found for $5-6, not to mention the waste electronics/recycling aspect, it seems like a smart move if you have the time and will. I did this with a Nexus 5, and broke a few clips on the back, but just enough to make the back easily removable but also stays on firmly during normal use. Now it's a regular replaceable battery phone.