Blackberry Bold playing up

[Anonymous]

My other half has just got herself an Iphone as an upgrade,So not wanting to feel left out had her Blackberry Bold hand me down ( been using a XDA Stelllar up till now):smileyhappy:

The trouble i am having is that there is no network, only sos calls and "phone not allowed" error message.

I have a brand new sim for it from O2 for the Blackberry but still no joy , Even If i put the original sim back in it it still comes up with the error

Can anything be done to fix this problem or has it become an expensive paper wieght?

[sheepdog]

Sounds like the phone is locked to another network. Was it originally on o2? Does the new sim work in the Stellar? 

[Anonymous]

Yes the phone is locked to the O2 network (she got it new and has never had it unlocked)

I have tried putting her sim back in but still comes up with the error

I will try my new sim in the Stellar as soon as i get home

[MI5 · Accepted solution]

Sometimes the SIM doesn't make good contact so a little trick is to stick some cellotape to the back of the sim (not the gold side ;)) to slightly thicken its overall size. Trim around the shape of the sim carefully and try it again.