連(れん)絡(らく) renrakuする suruなら nara電(でん)話(わ) denwaで deお()願(ねが)い()し()ま()す() onegaishimasu。 If you want to contact me, please do so by phone. Literal Contact do-[conditional-なら] phone [by-で] please. 連絡するなら ('if you're going to contact me') uses the ~なら conditional, which takes a hypothetical premise. 電話でお願いします is a polite request to use the phone. Concise and natural. requestscommunication~なら (conditional)
連(れん)絡(らく) renrakuする suruなら nara電(でん)話(わ) denwaで deお()願(ねが)い()し()ま()す() onegaishimasu。 If you want to contact me, please do so by phone. Literal Contact do-[conditional-なら] phone [by-で] please. 連絡するなら ('if you're going to contact me') uses the ~なら conditional, which takes a hypothetical premise. 電話でお願いします is a polite request to use the phone. Concise and natural. requestscommunication~なら (conditional)