how to prevent my cell phone from making :pocket calls?

I have nokia lumia 521 which I kept in my left pants pocket
lately my phone had accidentally dials
my mom a few time (i have her on speed dial)
what the best way to prevent this>?
as a temporary solution I deleted
all the number in my speed directory
do you that would prevent thpse calls?

Cedrick2016-08-14T12:53:28Z

2

emotionalzombie79972016-03-23T23:29:08Z

Purchase a cell phone dry box. I purchased a Outdoor Products cell phone dry box for less than $7 at K-Mart. You can also find the same product in at Wal-Mart in the camping section. If you keep your phone in a dry box, it will also prevent your phone from breaking if it is dropped.

Wilbert2016-03-24T23:08:41Z

You need to consult your service provider and ask them about the latest internet plans and if you have any security related issue, do Install LEO Privacy it has many advanced features which could be very useful for you.