Anthony Timson's Cellular Programming Terminal can reprogram the ESN and NAM on the NEC 9A, 11A, P3 (p300), and P4 (P400).
If you are having trouble with this TR5 blah blah model number crap, look at this
P-100
P-110
P-120
P-200 a.k.a. P2, TR5E800-26B
P-300 a.k.a. P3
P4
P700 U.S. model
P-701 a.k.a. P7, Australian model
9A
TR5E1320-9A
P9100 (TR5E800-9C)
11A
M3700 & M4600 (TR5E800-11C & G)
M4700 (TR5E800-11H) single NAM version
M4700 (TR5E800-11H) quad NAM version
P400 & P600
Opera
