[Galaxy Tab  Android Development] daveburnt:
GT-P1000M (Bell Canada variant w/working SIM & IMEI safe!) Flash Kit

This guide assumes you're coming from stock Gingerbread. Everything mentioned is included (you're welcome). Otherwise flash back by installing USB driver + run Odin tool (compatibility mode Win7 and as admin) + select the stock firmware file found in the folder named "Emergency Recovery". If you've damaged things further, also specify PIT file (make sure re-partition is checked), and if you get error stating /data /system can't be found that backup is also included should you be hard bricked without clockwork or TWRP recovery installed yet so there is ALWAYS a way to get it going again (hard brick = phone + yellow exclamation + computer icon on power up).

DOWNLOAD KIT HERE

Preparation: Copy contents of step 4 & 5 folder to SD card, insert in device. Alternatively, use stock device to copy over USB cable, OR perform steps 1 & 2 & 3 below, power on into clockwork recovery mode (power and vol+, release power when lit, then release vol+ once loaded), go into mount, mount SD card and plug USB into computer to copy over files.

Step 1: Install USB Driver called Step 1 and reboot computer.

Step 2: Plug in USB. Press power on device and hold vol- until "Downloading" screen apprears. Open Odin (run in compatibility mode for Win 7 + as Admin) called Step 2. Make sure you see a yellow (or blue in newer Odin) COM at the bottom of the status column. (If not, USB driver issue. Check device manager.)

Step 3: Click PDA button and select the Step 3 file for Clockwork Recovery. The status column should be green and state "Success". Power device off after it's rebooted (If you just want stock rooted you can stop here, but that's no fun!).

Step 4: Boot into Clockwork Recovery (power and vol+, release power when lit, then release vol+ once loaded). Use vol+/vol- buttons to scroll, home/power to select. Select wipe data/factory reset, then wipe cache. Then select to install a .zip. Go to the external sd and choose the Step 4 file (modded CM13 for GT-P1000M). It will run then it will reboot into TWRP (team win recovery project, it replaces Clockwork Recovery). Choose "Wipe", "advanced wipe", and tick Dalvik/cache, cache, System, Data. Go back to main menu and choose "Install", go up a level and select external sd (or whichever location you have the step 4 & 5 files). Select the Step 4 file again, it will stop on an error code stating that partitions will be changed and kick you to the menu. Repeat choosing the Step 4 file again and it will actually install the ROM this time. (If you get error can't mount /data /system, reboot into recovery again (vol+) and wipe Dalvik/cache, cache, System, Data. Try again).

Step 5: Once complete, reboot device normally and complete the initial setup (first boot takes a while, be patient). Once complete go into Settings > Device Settings > Big Mem > Select XL Mem. Power off and power on into Recovery mode again (vol+), choose install and select the Step 5 GAPPS file. Reboot normally and you're done!

Congratulations on your Rooted CM13 device with working SIM card, blutooth, wifi, cameras, google apps, whatever!

Backstory: The reason for cultivating this was a friend of mine dropped by on a motorcycle trip and traded for this old tablet, wondered if it was useful at all. Took me a rainy day to make all the necessary mistakes and repeated brickings before finally being victorious. So if I even save one person time, or someone who gave up, or someone who put up with partial functionality, no more suffering I say!

Credit to all the real devs who put this together, it was all there, just missing the GT-P1000M assert and proper modem.bin file I scoured this forum and broken link hunt for.

Please help rehost the kit, not sure how long my public link will last, or how long my free bandwidth quota will go for.