ESP8266 12E - How to upgrade to latest firmware

[IOT_idlc]

Hi,
This is kumar. I'm using ESP8266-12E At present we are testing them but we are facing so many problems since there is no proper technical support through internet. So please answer my below technical questions.

1. It's AT version is 0.25.0.0(Jun 5 2015 16:27:16) & SDK version is 1.1.1. I'm unable to change the baud rate since baud rate command & DHCP command are not working. So what is the latest version of AT firmware & SDK versions.
2. Is there any esp8266 tool for testing the ESP8266-12e through PC directly by using 'AT' commands.
3. If there is any latest versions for this module, please tell me the process how to upgrade my ESP8266-12E wifi module firmware. Please tell me what the tools that i need & also path for latest firmware, so that i can easily upgrade my module.
4. I put ESP8266-12E in (Station+SoftAP) mode. I connected the ESP8266 to my router & also I post data to other website also through ESP8266. I got the ESP8266 SSID in my mobile since it is in (Station+SoftAP) mode. so I connected my mobile to it. but i didn't get the net access in my mobile although it is connected to esp8266 which is in (Station+SoftAP) mode. My router has internet connection. So please tell me the procedure how to make ESP8266-12E as hot spot.

[ESP_Faye]

Hi,

1. Download AT firmware http://bbs.espressif.com/viewtopic.php?f=46&t=1451, download and unzip it, download the bin files into Flash according to the "readme.txt".
2. Please use ESP Flash Download Tool to download AT bin files into Flash, choose the corresponding Flash size according to your actual Flash size.
3. AT documentation :http://bbs.espressif.com/viewtopic.php?f=46&t=1451.

Thanks for your interest in ESP8266 !