I'm currently in the market for a tablet that has cellular connection under 300$ its tough using my small iPhone 5 to use dji go when the app drains 50% of my battery per flight, and is slow, laggy, and need to use a power bank because I have 2 batteries. What tablet should I get? Help is greatly appreciated

I'm also interested in this, P3 standard (noobie owner in UK) thought it was all ipad's but seen lots of others mentioned here?