Which is the best deal for prepaid mobile internet in europe?

Ill be in Spain and France for 3 weeks and need prepaid mobile internet or:I'll be in Spain and France for 3 weeks and need prepaid mobile internetor:

I'll be in Spain and France for 3 weeks and need prepaid mobile internet

or:I'll be in Spain and France for 3 weeks and need prepaid mobile internet

or:German Telekom if I was going to use a pre-paid phone

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