tx bands configuration via 4 solder pads in the pcb, behind a square sticker located under the battery, on the top-left corner.
i've number the pads as seen while looking to the back of the transceiver, with no battery and the ptt looking to your right.
1234 vhf_tx uhf_tx
oooo 136-174 400-479
ooos 136-174 430-440
ooss 144-146 430-440 (factory)
o = open
s = short
procceed at your own risk.
regards,
eb4eqa