Safe Removal of Kazama Tornado 348 Back Flap: Optimal Heating Time and Tools

Hello
Wanting to be a bit more embraced on the phones, I decided to start Kazama Tornado 348 for educational purposes
And this is a phone that has a double-sided tape on the back cover, I took a hair dryer and a guitar bow. I blew this dryer a bit for 2-3 minutes and the glue did not move. I blew a little more, but the aluminum frame was already very warm and I stopped heating because I was afraid that I would damage the motherboard. The phone works fine. And now the question is, how much more or less do I need to heat the phone to be able to remove this flap and not be afraid that something will happen to the motherboard under the influence of temperature.
Do I need a hot air soldering iron to do it with peace of mind?
And do I need anything more than a guitar bow?
How do you deal with removing the back flap?
Thanks in advance for your answers

You need to heat up to about 90 degrees, best to do it with a heater, but a dryer will also do the trick it's best to start from the edge and gently pry it with something thin, for example with a guitar pick I did so. or something stiff but thin. When it starts to peel off, substitute something where it is already detached and continue to heat up. It is important not to rush and watch how the glue is released. I did it twice with the glass flap and it worked. I am sending greeting and I wish you good luck.

And heat it up for at least 5 minutes with a dryer? d

Heat up and see from time to time if it starts to let go time is hard to tell I did it with a heater borrowed from a neighbor but I also watched if the glue was starting to release and I opened the flap, prying it open. If you only do flip removal tests, you have nothing to fear. If the operation is unnecessary, it is better to do it sensitively and carefully.

131XIII wrote:

I stopped heating because I was afraid that I would damage the motherboard.

Lead-free solder melts at about 230 degrees.
If the dryer reached this temperature, it would burn your head

Okay; d
So I would have to try very hard to damage the motherboard with the temperature?

Sure. Just do not burn yourself when heating up because you need to heat up quite a bit.

Glued phones with a battery inside, I do not recommend putting them on a heater. It is best to heat it up only at one point and not too much, and then with a scalpel (I use blades to remove the glue from under the polarizer), slightly lift the flap and insert the playing card into the slot. Once the card sits under the flap, we can easily cut the entire tape.

In the new phones, everything is so folded that an ordinary wallpaper knife has a too thick blade, let alone a guitar pick.

I opened them all with a dryer. It's just that I put the phone in a container to limit the air blow to the sides and then I drift with a dryer to the maximum - it is much more efficient and faster than on the table. After about 1 minute, when it is very hot, I lift the backs with a plastic in the shape of a guitar feather.

jackq wrote:

I opened them all with a dryer. It's just that I put the phone in a container to limit the air blow to the sides and then I drift with a dryer to the maximum - it is much more efficient and faster than on the table. After about 1 minute, when it is very hot, I lift the backs with a plastic in the shape of a guitar feather.

Did you do galaxy s6, s7 ??

https://www.youtube.com/watch?v=vo8r7RE-anQ everything and to the point.