Intense heat will damage or destroy the Battery. Also, heat will damage
or destroy the Liquid Crystal Display (LCD) by melting the crystal.
Try the phone with battery charger connected. With Charger connected
and powering the phone, try to turn on. The Back light is usually driven
by LED s which are robust and can sustain the Dryer heat.
If the phone back light comes on, the the phone electronics is probably OK and will still work as a phone.
The Battery can be replaced, but there is no easy way to replace a bad
So, Power with Charger, look for light, try dialing without display.
- If above suggestions fails , then its better to approach an authorized service center
Hope this helps.