... if you are French and want to pronounce the letters like a native English speaker:

a   eille
b   bi
c   ci
d   di
e   i
f   effe
g   dji
h   èyetch
i   aïe
j   djèye
k   kèye
l   elle
m   emme
n   enne
o   o
p   pi
q   kyou
r   âar
s   esse
t   ti
u   you
v   vi
w   dabeulyou
x   ex
y   ouaille
z   zède (or "zi" if you want to sound like an American|Eumériqueunn)

Repeat 10 times, as fast as you can: eille, bi, ci, di, i, effe, dji, èyetch, aïe, djèye, kèye, elle, emme, enne, o, pi, kyou, âar, esse, ti, you, vi, dabeulyou, ex, ouaille, zède.

Let us study the numbers now:

1   ouane
2   tou
3   (impossible to pronounce, do not try. Say "tou pleuss ouane".)
4   faur
5   faïve
6   sikss
7   séveunn
8   èyete
9   nayyne
10  tène

Examples:

FBI                -> efbi-aïe
E2                 -> itou
George W. Bush     -> djorge dabeulyou bouche
http://www.cia.com -> èyetchtitipi, kaleunn-slach, slach,
                      dabeulyou-dabeulyou-dabeulyou,
                      dotsi-aïe-eille, dotcomme (yeah!)

Now you are ready to sound like an London-born New Yorker.