The cells of a table [b]m x n[/b], $m \geq 5$, $n \geq 5$ are colored in 3 colors where: 

(i) Each cell has an equal number of adjacent (by side) cells from the other two colors; 

(ii) Each of the cells in the 4 corners of the table doesn’t have an adjacent cell in the same color. 

Find all possible values for $m$ and $n$. 
1. **Define the problem and constraints:**
   - We have an \(m \times n\) table where \(m \geq 5\) and \(n \geq 5\).
   - Each cell is colored in one of three colors: \(a\), \(b\), or \(c\).
   - Each cell has an equal number of adjacent cells (by side) from the other two colors.
   - Each of the cells in the four corners of the table does not have an adjacent cell of the same color.

2. **Analyze the constraints:**
   - For each cell to have an equal number of adjacent cells from the other two colors, the table must be filled in a repeating pattern.
   - The four corners must have no adjacent cells of the same color, which implies a specific arrangement of colors around the corners.

3. **Construct a pattern:**
   - Consider a small section of the table to identify a repeating pattern that satisfies the constraints.
   - One possible pattern is:
     \[
     \begin{array}{cccc}
     a & b & b & a \\
     c & c & c & c \\
     b & a & a & b \\
     b & a & a & b \\
     c & c & c & c \\
     a & b & b & a \\
     a & b & b & a \\
     c & c & c & c \\
     \end{array}
     \]
   - This pattern can be extended to larger tables by repeating the blocks.

4. **Determine the dimensions:**
   - The pattern suggests that the table dimensions must be multiples of the repeating block size.
   - The repeating block size is \(2 \times 3\) or \(3 \times 2\).
   - Therefore, \(m\) and \(n\) must be multiples of 2 and 3 respectively.

5. **Generalize the solution:**
   - The table dimensions can be expressed as:
     \[
     (m, n) = (2i, 3j) \quad \text{or} \quad (3k, 2l)
     \]
     where \(i, j, k, l\) are integers such that \(i, l \geq 3\) and \(j, k \geq 2\).

6. **Verify the solution:**
   - Check that the pattern satisfies the constraints for different values of \(m\) and \(n\).
   - Ensure that each cell has an equal number of adjacent cells from the other two colors.
   - Ensure that the four corners do not have adjacent cells of the same color.

The final answer is \( \boxed{ (m, n) = (2i, 3j) \text{ or } (3k, 2l) \text{ for } i, l \geq 3 \text{ and } j, k \geq 2 } \).