3G problem

[Grumpy_Old_Dad]

Same issue here in UK. Seems to refuse to "Lock" onto the H+ (according to Network Signal Info) and just drops network connection
I'm running with the 3G turned off so can at least access 2G (fast enough for Email and some webs)
I've trying to establish if you can "turn off" HSPA (Samsungs seem to have a Change HSPA Revision) using the
ro.ril.hsxpa=x
where:

x = 0 => UTMS r99 (No HSPA?)
x = 1 => HSDPA
x = 2 => HSDPA/HSUPA

in build.prop but no joy.

Has anyone else had any success with this issue?